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Key Features

• -THIS WOMEN'S SHOE IS FOR: The Glycerin GTS 21 is for runners who think there is no such thing as too much cushioning but seek additional support from our trusted GuideRails holistic support system. This Brooks Glycerin GTS 21 has been granted the APMA Seal of Acceptance. Predecessor: Brooks Glycerin GTS 20.
• -GREAT SUPPORT: The Glycerin GTS 21 is the more supportive version of the Glycerin 20. The innovative GuideRails holistic support system supports your body in its natural motion path while keeping excess movement in check. Ideal for road running, cross training, the gym or wherever you might want to take them!
• -PLUSH IMPROVED FIT: The plush feel of an internal stretch bootie surrounds your foot and moves and expands with your stride. The newly engineered warp knit upper is breathable and allows for a flexible, accommodating fit while staying soft against the foot.
• -SUPREME SOFTNESS: The ultimate in softness and supreme comfort, designed for runners who want pillowy soft cushioning. The Glycerin GTS 21 with nitrogen-infused DNA LOFT v3 cushioning offers supreme softness optimized to be lightweight, responsive, and durable for plush comfort.
• -SMOOTH, STABLE TRANSITIONS: The broad platform stabilizes your foot and promotes smooth heel-to-toe transitions for a supremely soft on-the-run experience.