Women's Glycerin 21Enjoy supreme softness and ultimate comfort from your first step. The neutral Glycerin 21 women's running shoe provides a plush ride, thanks to more DNA LOFT v3 cushioning than before, plus a new, more streamlined upper that delivers structure and breathability. Compared to the Glycerin20, the 21 features 2mm more of our super soft, nitrogen infused DNA LOFT v3 cushioning to maximize softness. New, engineered warp knit upper is breathable and allows
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