Runner's comfort optimized! The Brooks Glycerin 20 is engineered to keep you going miles after miles. Made with air-mesh, the new pluche and breathable design of the upper offers a well-ventilated and snug fit. The upper is reinforced in strategical places for a more structured fit and targeted support. Likewise, it is flexible in other places to enable freedom of movement. Featuring DNA LOFT v3 cushioning material injected with nitrogen, these sneakers ensure a soft and lightweight feel during long runs. Sprint to the finish line with the Brooks Glycerin 20. Redesigned mid and outsole with a wide platform allows a more flexible and smoother heel-to-toe transition.