Our softest cushioning for supreme comfort and distraction-free miles. Nitro-infused softness: Experience ultimate cushion in the Glycerin 20 with nitrogen-infused DNA LOFT v3 technology, which delivers lightweight, super-soft cushioning and ultimate comfort for your feet. Updated midsole features nitrogen-infused DNA LOFT v3, our softest cushioning yet. New cushioning and redesigned outsole deliver smoother and more stable transitions. All-new engineered mesh upper is lightweight and breathable. Fit B-NORMAL