Choosing between Glycerin 19 and 20 might feel challenging since both excel. These shoes represent Brooks’ commitment to maximum comfort and plush cushioning. I recommend the Glycerin 20 for its revolutionary DNA Loft v3 foam. The nitrogen-infused midsole creates lighter, softer, and springier rides than its predecessor.
Plus, the improved responsiveness makes it more versatile across different paces. While the Glycerin 19 delivers reliable comfort, the 20 takes everything further. Let’s dive deep into what makes each version special.
Why Do I Recommend The Glycerin 20?
The Glycerin 20 represents a significant evolution in Brooks’ cushioning technology. Here’s why this upgraded model deserves your investment:
• DNA Loft v3 Nitrogen-Infused Foam – The Glycerin 20 features groundbreaking DNA Loft v3 with nitrogen injection. In contrast, the Glycerin 19 uses original DNA Loft formulation without nitrogen. This creates noticeably softer and more responsive cushioning underfoot.
• Lighter Weight Construction – The Glycerin 20 weighs approximately 10.4 ounces for men’s size 9. Meanwhile, the Glycerin 19 weighs 10.2 ounces for the same size. Despite similar weights, the 20 feels lighter due to responsive foam.
• Enhanced Energy Return – The v3 foam delivers superior bounce and springiness during toe-off. Conversely, the Glycerin 19 provides adequate but less dynamic energy feedback. This makes the 20 more enjoyable for varied pace running.
• Improved Midsole Geometry – The Glycerin 20 features redesigned vertical flex grooves in the forefoot. However, the Glycerin 19 uses horizontal flex grooves throughout the sole. The vertical grooves create smoother, more natural transitions effectively.
• Thinner Outsole Design – The Glycerin 20 sports a streamlined outsole that reduces overall weight. In contrast, the Glycerin 19 has thicker blown rubber coverage everywhere. This weight savings improves efficiency without sacrificing significant durability.
• 7mm Wider Midfoot Platform – The Glycerin 20 measures 7mm wider through the midfoot area. Meanwhile, the Glycerin 19 runs narrower which causes fit issues. This expansion makes the 20 more accommodating for average feet.
• Premium Engineered Air-Mesh Upper – The Glycerin 20 uses refined plush engineered air-mesh construction. Conversely, the Glycerin 19 features standard engineered mesh with less breathability. The upgraded material enhances comfort and airflow simultaneously.
• Better Versatility Across Paces – The Glycerin 20 handles recovery runs, long runs, and moderate tempos. However, the Glycerin 19 feels sluggish when attempting faster-paced efforts. The improved responsiveness makes the 20 more adaptable for training.
Side By Side Comparison Chart: Glycerin 19 vs 20
| Feature | Glycerin 19 | Glycerin 20 |
| Release Year | 2021 | 2022 |
| Weight (Men’s Size 9) | 10.2 oz (289g) | 10.4 oz (295g) |
| Midsole Foam | DNA Loft original | DNA Loft v3 nitrogen-infused |
| Stack Height | 31mm cushion | 32-33mm cushion |
| Heel-to-Toe Drop | 10mm | 10mm |
| Flex Groove Design | Horizontal forefoot grooves | Vertical forefoot grooves |
| Outsole Thickness | Thicker blown rubber | Thinner streamlined rubber |
| Midfoot Width | Standard narrow fit | 7mm wider platform |
| Upper Material | Engineered mesh | Engineered air-mesh |
| Tongue Design | Gusseted padded tongue | Gusseted plush tongue |
| Price Range | $150 | $160 |
| Energy Return | Moderate response | Enhanced springy response |
| Best For | Recovery and easy runs | Versatile daily training |
| Available Versions | Regular and GTS | Regular, GTS, and StealthFit |
What Common Features Can Glycerin 19 vs 20 Deliver?
Premium DNA Loft Cushioning Platform
Both shoes showcase Brooks’ signature DNA Loft foam technology throughout midsoles. This proprietary foam blend combines EVA, rubber, and air for softness. The cushioning provides exceptional shock absorption during heel strikes and landings. Runners experience reduced joint stress that protects knees and ankles effectively.
Both models deliver plush underfoot sensations that define the Glycerin experience. The foam maintains its cushioning properties across hundreds of training miles. This consistency makes both shoes reliable for long-distance running and recovery.
Maximum Cushion Neutral Support Design
The Glycerin 19 and 20 both cater to neutral runners primarily. Neither model includes aggressive stability features like medial posts or guide systems. The wide base design provides inherent stability through geometric engineering principles. Both shoes accommodate runners who don’t need pronation correction or guidance.
The neutral platform allows natural foot motion throughout the entire gait. Runners with normal arches find both models comfortable without restrictive elements. This design philosophy makes both versions versatile for various foot types.
Plush Internal Stretch Bootie Construction
Both models feature internal stretch bootie technology that wraps feet comfortably. This seamless construction creates sock-like sensations that move with strides. The bootie eliminates traditional tongue and lacing pressure points effectively. Runners experience step-in comfort from the very first wear immediately.
Both shoes adapt dynamically to foot shape changes during running. The plush materials used throughout enhance overall comfort levels significantly. This internal construction distinguishes Glycerin shoes from competitors consistently.
Gusseted Tongue Anti-Migration Design
The Glycerin 19 and 20 both incorporate gusseted tongues that stay centered. This design prevents tongue migration during dynamic running movements effectively. The gusseting eliminates the need for constant mid-run lace adjustments. Both tongues provide adequate padding for comfortable lace pressure distribution.
The construction creates secure midfoot lockdown without excessive tightness feelings. Runners appreciate reduced friction between tongue and foot during long runs. This design detail enhances overall comfort without adding significant weight penalties.
OrthoLite Premium Sockliner Technology
Both shoes feature high-quality OrthoLite sockliners as standard equipment. These premium insoles enhance initial step-in comfort and cushioning perception. The material maintains its cushioning properties even after extensive wear periods. Both sockliners resist compression better than traditional foam alternatives do. The antimicrobial properties reduce odor development during heavy training schedules.
Runners can remove sockliners easily to accommodate custom orthotic inserts. The premium insoles contribute significantly to the overall comfort both deliver.
Full-Length Rubber Outsole Coverage
The Glycerin 19 and 20 both feature blown rubber across outsoles. This soft rubber compound provides excellent traction on dry surfaces. The material enhances flexibility while maintaining adequate grip on roads. Both outsoles include strategically placed flex grooves for natural foot motion.
The rubber coverage extends from heel to toe for complete protection. Runners get reliable traction during various weather conditions and surfaces. The blown rubber proves more comfortable than harder compounds typically.
10mm Heel-to-Toe Drop Standard
Both models maintain Brooks’ traditional 10mm heel-to-toe drop measurement. This higher drop suits heel strikers and traditional running mechanics perfectly. The elevated heel encourages natural heel-first landing patterns during footstrikes. Runners transitioning from conventional shoes adapt easily to this familiar geometry.
The 10mm drop provides adequate Achilles tendon protection for less flexible runners. Both shoes accommodate runners preferring traditional cushioned trainer geometries consistently.
Common Features of Glycerin 19 vs 20
| Feature | Glycerin 19 | Glycerin 20 |
| DNA Loft Cushioning | ✓ Original formulation | ✓ V3 nitrogen-infused |
| Neutral Support | ✓ No stability features | ✓ No corrective elements |
| Internal Bootie | ✓ Stretch construction | ✓ Seamless fit |
| Gusseted Tongue | ✓ Anti-migration design | ✓ Centered stability |
| OrthoLite Sockliner | ✓ Premium insole | ✓ Cushioned footbed |
| Blown Rubber Outsole | ✓ Full coverage | ✓ Strategic placement |
| 10mm Drop | ✓ Traditional geometry | ✓ Standard offset |
| True to Size Fit | ✓ Runs slightly narrow | ✓ Wider midfoot fit |
| GTS Version Available | ✓ With GuideRails | ✓ With GuideRails |
| Premium Price Point | ✓ $150 MSRP | ✓ $160 MSRP |
A Detailed Comparison Of the Glycerin 19 vs 20
Midsole Foam Technology and Feel
The Glycerin 19 utilizes the original DNA Loft foam throughout its midsole. This blend creates a firm, medium-soft cushioning sensation during running. The foam compresses predictably under body weight without feeling mushy or unstable. Runners experience reliable, consistent cushioning that never feels overly soft. However, the foam lacks the lively bounce that makes running feel effortless. The ride quality remains stable but somewhat uninspiring for faster-paced efforts.
The Glycerin 20 features revolutionary DNA Loft v3 nitrogen-infused supercritical foam. This advanced formulation delivers noticeably softer landings with superior energy return. The nitrogen bubbles create a springier, more responsive sensation during toe-off. Runners feel enhanced propulsion that makes maintaining pace easier and more natural. The v3 foam maintains softness while adding performance characteristics missing from predecessors. This upgrade transforms the Glycerin from pure comfort shoe to versatile trainer.
Weight Distribution and Running Feel
The Glycerin 19 weighs 10.2 ounces for men’s size 9 shoes. This moderate weight feels appropriate for a maximum cushioned daily trainer. The weight distribution remains balanced throughout the entire shoe platform evenly. Runners notice the shoe feels slightly heavy during faster running efforts. However, the weight doesn’t hinder easy-paced runs or recovery sessions significantly. The Glycerin 19 works best for comfortable, relaxed running without speed ambitions.
The Glycerin 20 comes in at 10.4 ounces despite the advanced foam. The slight weight increase comes from additional features and construction refinements. However, the improved foam makes the shoe feel lighter and more nimble. Runners experience less fatigue during extended runs despite the marginal weight gain. The responsive cushioning offsets the weight penalty during dynamic running movements. The Glycerin 20 feels more lively and engaging throughout various paces.
Outsole Design and Flexibility
The Glycerin 19 features horizontal flex grooves across the forefoot area. This traditional design allows moderate flexibility during toe-off transitions predictably. The thicker blown rubber provides excellent durability across hundreds of training miles. However, the horizontal grooves don’t optimize the midsole foam’s performance characteristics. Runners experience adequate but not exceptional flexibility during gait cycles. The outsole proves durable but adds noticeable weight to the overall package.
The Glycerin 20 showcases redesigned vertical flex grooves through the forefoot. This innovative orientation works better with the DNA Loft v3 properties. The vertical grooves create smoother, more natural rolling transitions from heel to toe. Runners notice improved flexibility that enhances the overall ride quality significantly. The thinner outsole reduces weight while maintaining adequate traction and protection. This design creates a more performance-oriented feel compared to its predecessor.
Upper Construction and Breathability
The Glycerin 19 uses engineered mesh with traditional construction throughout the upper. This material provides good breathability for moderate temperature running conditions adequately. The mesh stretches accommodatingly around various foot shapes and volumes reasonably. However, the construction runs narrower through the midfoot causing fit issues. Some runners find the mesh less breathable during hot summer conditions. The upper proves durable enough to withstand hundreds of training miles.
The Glycerin 20 employs refined engineered air-mesh with improved ventilation properties. This premium material enhances breathability significantly compared to the previous version. The mesh feels softer and more luxurious against skin during extended wear. The 7mm wider midfoot platform eliminates the narrow fit complaints entirely. Runners with average to wider feet appreciate the more accommodating dimensions. The air-mesh maintains structural integrity while providing superior comfort throughout runs.
Midfoot Fit and Width Dimensions
The Glycerin 19 maintains Brooks’ traditionally narrow midfoot design throughout the shoe. This snug fit works well for runners with narrow to average feet. However, runners with wider feet experience uncomfortable squeezing through the midfoot. The narrow construction causes some runners to size up half sizes. The tight midfoot can restrict natural foot splay during footstrike and push-off. This fit issue represents the most common complaint about the Glycerin 19.
The Glycerin 20 measures 7mm wider through the midfoot compared to its predecessor. This expansion makes the shoe significantly more accommodating for average foot widths. Runners no longer need to size up to achieve comfortable midfoot fit. The wider platform enhances stability without sacrificing the secure lockdown feeling. The improved dimensions eliminate the narrow feel that plagued previous versions. This single change dramatically improves the overall fit satisfaction for many runners.
Transition Smoothness and Rocker Feel
The Glycerin 19 provides smooth transitions from heel strike to toe-off phases. The 10mm drop combined with toe scoop creates natural rocker-like qualities. However, the horizontal flex grooves don’t maximize the transition smoothness potential. Runners experience predictable but not exceptional gait cycle progressions throughout runs. The transitions work well for easy running but feel sluggish at faster tempos. The ride remains stable and consistent without dramatic heel-to-toe rocking.
The Glycerin 20 delivers enhanced transition smoothness through improved midsole geometry carefully. The vertical flex grooves work synergistically with the springy DNA Loft v3. Runners notice more pronounced rocker characteristics that accelerate natural foot motion. The transitions feel more effortless and energy-efficient compared to the previous version. The improved geometry makes the shoe feel faster without sacrificing cushioning comfort. This enhancement makes the Glycerin 20 more versatile across pace ranges.
Price Point and Value Analysis
The Glycerin 19 retails at $150 making it Brooks’ premium neutral trainer. This price point positions it above the Ghost and Launch models. The reliable comfort and durability justify the investment for comfort-focused runners. However, the limited versatility across paces reduces the overall value proposition. Seasonal sales frequently reduce prices making it more attractive to budget-conscious shoppers. The Glycerin 19 represents solid value when found at discounted prices.
The Glycerin 20 commands $160 reflecting the advanced DNA Loft v3 technology. The $10 price increase represents meaningful innovation over the previous generation. The improved responsiveness and versatility enhance the cost-per-use value significantly effectively. Serious runners appreciate the performance upgrades that justify the premium pricing. However, casual runners might question whether the improvements warrant the additional cost. The Glycerin 20 offers better value for runners seeking versatile daily trainers.
Available Upper Versions and Options
The Glycerin 19 comes in two versions: regular neutral and GTS stability. The standard version provides neutral support for runners without pronation issues. The GTS version adds Brooks’ GuideRails technology for mild overpronators needing support. Both versions share identical midsole and outsole construction throughout completely. The upper designs remain consistent across both neutral and stability models. This limited selection keeps things simple but reduces customization options available.
The Glycerin 20 expands to three distinct versions for various preferences. The regular version maintains traditional construction with engineered air-mesh materials. The GTS version adds GuideRails stability for runners needing pronation control. The new StealthFit version features lightweight knit upper construction that reduces weight. The StealthFit upper provides a more sock-like sensation for minimalist preferences. This expanded lineup allows runners to choose their ideal combination perfectly.
Conclusion
The Glycerin 20 emerges as the clear winner for most runners. Its DNA Loft v3 foam delivers superior softness and responsiveness simultaneously. The 7mm wider midfoot eliminates fit issues that plagued the Glycerin 19. The improved transitions and energy return make every run more enjoyable. At $160, you’re investing in cutting-edge nitrogen-infused cushioning technology that transforms comfort. Click through to Amazon and experience why the Glycerin 20 represents Brooks’ cushioning evolution. Your feet deserve the ultimate in plush, responsive comfort today.
FAQs
Q: Is the Glycerin 20 worth the extra $10 over Glycerin 19?
A: Absolutely. The DNA Loft v3 foam provides noticeably better cushioning and responsiveness. The wider midfoot fit eliminates common complaints about the Glycerin 19. The improved energy return makes the shoe more versatile across paces. If you can afford the difference, the Glycerin 20 delivers superior value.
Q: Can I use either shoe for marathon training?
A: Both shoes excel for marathon training, especially long runs and recovery days. The maximum cushioning protects joints during high-mileage training blocks effectively. The Glycerin 20 handles tempo runs better than the 19. Consider rotating them with lighter shoes for speed work and racing.
Q: Do these shoes run true to size?
A: The Glycerin 19 runs true to size but narrow through midfoot. Many runners size up half a size for comfortable fit. The Glycerin 20 fits true to size with improved midfoot width. Most runners find their normal size works perfectly in the 20.
Q: Which shoe lasts longer before needing replacement?
A: Both shoes typically last 400-500 miles under normal training conditions. The Glycerin 19’s thicker outsole may last slightly longer overall. However, the Glycerin 20’s DNA Loft v3 maintains cushioning properties better. Proper rotation with other shoes extends lifespan for both models significantly.
Q: Are these shoes good for walking and standing all day?
A: Both excel for all-day wear, walking, and extended standing activities. The maximum cushioning reduces fatigue during long shifts standing or walking. Healthcare workers and retail employees love both Glycerin models equally. The Glycerin 20’s improved responsiveness makes walking feel slightly more energetic.
Q: Can beginners use the Glycerin 20 effectively?
A: Absolutely. The Glycerin 20 works excellently for beginning runners needing cushioned protection. The maximum cushioning protects inexperienced legs from impact stress during adaptation. The responsive foam makes running feel easier and more natural immediately. New runners appreciate the comfort that encourages consistent training habits.
Q: How do these compare to ASICS Gel Nimbus?
A: The Nimbus provides slightly more stack height and maximum cushioning overall. The Glycerin 20 delivers superior responsiveness and energy return characteristics. The Nimbus runs true to size while Glycerin 19 runs narrow. Both are excellent max-cushion trainers with different ride characteristics and preferences.
Q: Which shoe is better for faster tempo runs?
A: The Glycerin 20 significantly outperforms the Glycerin 19 for tempo workouts. The DNA Loft v3 foam provides bounce that makes faster paces manageable. The Glycerin 19 feels heavy and sluggish when attempting speed work. Choose the 20 if tempo runs are part of your training routine.
Alex Turner is a dedicated product researcher and reviewer at TopBuyGuide.com, known for his clear, honest, and data-driven insights. He spends countless hours testing, comparing, and analyzing products to help readers make confident and informed buying decisions.