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The new Brooks Glycerin 21 is packed with 2 mm. more super-soft, nitrogen-infused DNA LOFT v3 cushioning that is optimized to be lightweight, responsive, and durable for long-lasting plush comfort.
The engineered warp-knit upper is breathable and allows for a flexible, accommodating fit while staying soft against your foot.
The broad platform of the Glycerin 21 stabilizes your foot to promote smooth and efficient heel-to-toe transitions.
Glycerin 21 is made with recycled materials equivalent to five plastic bottles. Included in that mix is new RoadTack rubber in the sole of the shoe. RoadTack incorporates recycled silica and is both lightweight and durable while giving this shoe great grip.
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