Men's Glycerin Flex SIZE:12.5 The softest layer in your

The softest layer in your running wardrobe just got an upgrade — our women's half zip running top has a watch window so you can stay warm and toasty when you check your pace

Easy on and off for quick layering adjustments

Staff-Tested: Saucony Ride 19

The most responsive spike on the track

Men's Glycerin Flex SIZE:12.5 The softest layer in yourThe Brooks Glycerin Flex brings together plush cushioning and adaptive flexibility to help runners move with confidence. DNA Tuned cushioning uses a dual cell nitrogen infused design to create soft landings in the heel and responsive toe offs in the forefoot. The result is a smooth, efficient ride that feels connected from the moment your foot hits the ground. A new engineered flat knit upper adds breathable comfort while allowing natural foot motion.