Dynamic frame technology prevents sideways collapse

Lace up and head out in supreme comfort. For the men's Glycerin GTS 21, we added 2mm more super soft DNA LOFT v3 cushioning for extra plushness, while our innovative GuideRails support system keeps you comfortably in stride. Plus an updated, streamlined upper adds breathability.

Supreme softness
Compared to the Glycerin 20, the Glycerin 21 features 2mm more of our super-soft, nitrogen-infused DNA LOFT v3 cushioning to maximize softness.
Improved fit
New, engineered warp knit upper is breathable and allows for a flexible, accommodating fit while staying soft against your foot.
Smart support
Our innovative GuideRails technology supports your body in its natural motion path while keeping excess movement in check

Features:

• Supreme softness
• Improved fit
• Whole-body support
• Midsole drop - 10mm
• Weight - 10.5oz / 297.7g

Engineered mesh promotes constant airflow during high exertion activities