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Glycerin 21
Brooks

Glycerin 21

shoes 📅 Released March 2024

Brooks' softest shoe with DNA LOFT v3 nitrogen-infused cushioning. Pillowy soft landings with a smooth rocker transition. The premium choice for comfort-first runners.

★★★★★ 5.0 · 1 reviews Unproven
50
Proof Score
Unproven
Durability
80%
Comfort
100%
Fit
90%
Value
80%
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Reviews (1)

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🏃 TestRunner
★★★★★ Mar 17, 2026
Brooks' softest shoe, and it shows
DNA LOFT v3 nitrogen-infused foam is a step above the already-great Glycerin 20. Recovery runs feel indulgent in these. The rocker geometry makes for smooth transitions without effort. I bought a backup pair — that's how much I love these.
🏃 190 mi tested 🗺 road Durability: 8/10 Comfort: 10/10
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