The Glycerin 20 is Brooks' cushioned daily trainer, designed for all sorts of running, from recovery days to long runs. The upper is an airy mesh that's light and breathable but comes with plenty of cushioning around the collar and tongue. 32.4 % Recycled materials in the upper 4.66 Plastic bottles diverted from landfills Best For… Super soft cushioning Road running Smooth transitions Walking Features Supreme softness Improved fit Smooth transitions New lightweight upper Size 8.5 Pre Owned Smoke Free Home