The newly enhanced Brooks Glycerin 15 gives neutral runners a truly luxurious ride from optimal cushioning and an improved upper design. This new version features an upper comprised of a 3D Stretch Printed Saddle that offers a supremely personal, adaptive and comfort-driven fit. The plush, neutral running shoe runners have loved for years now provides even more impact protection and step-in softness made to last for miles and miles. Upper: Air Mesh with 4-Way Stretch expands with the foot and provides excellent breathability. 3D Stretch Printed Saddle and overlays add structure and adaptive stretch for a secure fit. Padded tongue and heel collar enhance comfort. Lace-up front offers an adjustable fit. Midsole: Super DNA midsole with Omega Flex Grooves provides optimum adaptive cushioning. Soft, plush interior provides a comfortable feel at all times. Full-length Segmented Crash Pad provides cushion and smooth heel-to-toe transition, maximizing the efficiency of every stride. Removable insole. Outsole: IDEAL Pressure Zones disperse impact for an effortless ride. Plush Transition Zone provides smooth, heel-to-toe turnover. Blown Rubber Forefoot provides better traction.