Softness has never been this powerful thanks to the new Brooks running shoe. Experience DNA Tuned, the new nitrogen-infused cushioning in the midsole that delivers plush landings and responsive toe-offs with every step. The Glycerin 22 features: Featuring new, nitrogen-infused DNA tuned cushioning optimized for plush landings and responsive toe-off's New/ Engineered double jacquard knit upper provides a flexible, accommodating fit The broad platform stabilizes your foot and promotes smooth heel-to-toe transitions Tuned cushion Accommodating fit Smooth, stable transitions 61.3 % recycled materials in the upper