Super DNAis a material that offers more cushioning than any other Brooks midsole material, updated to provide a softer yet lighter underfoot sensation. Super DNA molds to the foot while adapting to changes in pace and environment.S-257 Cushsole is a midsole compound used as an insole to deliver even more cushioning and flexibility.Caterpillar Crash Pad is a segmented crash pad that flexes with the foot, offering customized cushioning and stability for a smooth heel-to-toe transition.Omega Flex Grooves enhance midsole flexibility without compromising cushioning. A soft underfoot feel with a high level of cushioning, the Brooks Glycerin 15 is a neutral daily trainer built to handle any distance.