CA Notice at Collection: Designed for all footstrikes, the responsive yet generously cushioned Glycerin Stealthfit GTS transcends the comfort and versatility of most stability shoes.
- The 7 Best Running Shoes for Narrow Feet
- Stretchy and breathable knit upper.
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Type: Road
Price: $160
Weight: 9.7 oz (M), 8.7 oz (W)
Drop: 10 mm
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The Glycerin, Brooks’s most cushioned shoe, is not just some colossus reserved for slow and steady runs. Today’s model is more dynamic, more streamlined, and more responsive. The Stealthfit GTS 20 features elements from the brand’s other models, but this Glycerin is more of a monster on the road than Frankenstein’s experiment. Like it did with the Levitate 5, Brooks has released two versions of the Glycerin and Glycerin GTS 20 (the GTS is the stability version), giving runners a choice between a traditional engineered mesh upper and a knit version dubbed “Stealthfit Fit.”
Brooks’s knit uppers have come a long way since 2018’s Levitate. When I tested the first Levitate, my feet overheated and the ribbed collar gave me some nasty blisters on my heels. The Glycerin GTS 20’s new Stealthfit upper is thin and stretchy and adapts to your foot’s shape; I no longer have to wear thick crew socks ldquo;Go-To Support” meets your go-to shoe.
The Glycerin GTS 20’s midsole is another feature we’ve seen before. Last year, the Aurora-BL introduced DNA Loft v3, a bouncier version of Brooks’s nitrogen-infused foam that’s found in the brand’s racing shoes like the Hyperion Elite and Hyperion Tempo. This switch from DNA Loft to v3 offers more energy return and rebound on an even softer platform. Even with that high-powered foam, it’s unlikely you’re going to reach for either Glycerin for intervals or races, but it’s performed admirably on easy runs that turn into spirited dashes back home.
“The cushioning is the shoe’s highlight,” said one tester who previously liked zippy neutral shoes like the Altra Torin 8: The Brooks Ghost of Zero-Drop Shoes and Asics Magic Speed 2. “It’s soft and cozy, and easy to forget on long runs. When running quicker intervals and speedwork on the track, it definitely felt too soft, too cushiony, and slow upon push-off.”
Wear-Tester Feedback
Brooks’s knit uppers have come a long way since 2018’s
Arch: High | Pronation: Neutral | Footstrike: Forefoot
“The ride of the Glycerin GTS is what I enjoyed the most. It did take a few miles to break in and for my body to adjust to the shoe. Previously, I was wearing my New Balance Fresh Foam X Vongo v5 that provided more stability for my longer runs. At first, the Glycerin GTS had a mushy, wobbly feel to it and left me feeling like my feet and ankles were a little more tired than usual. I now love this shoe on my long runs. It is well-cushioned at the forefoot and makes going up hills really comfortable—I don’t feel as much pounding on the steep inclines. On slow and easy runs, the ride is just as good. It’s comfortable and responsive without feeling like I’m losing energy or bounce.”
Amanda Furrer, Runner’s World test editor, studied journalism at NYU and writing at Emerson College. She has reviewed gear and covered other topics in the running space for almost 10 years. Since 2013, she has consecutively run the Boston Marathon. She also has a master’s degree in gastronomy from Boston University and was formerly a professional baker for two years before hanging up her apron.
