Brooks Women's Adrenaline GTS 14 Running Shoe Mesh Rubber sole Extended Caterpiller Crash Pad: Allows full ground contact for a crazy nice heel-to-toe transition Adjustable saddle design for targeted support Element linings are breathable and help wick away moisture to keep feet cooler and drier HPR Plus delivers long-lasting durability in high-wear areas of the outsole Omega Flex Grooves allow for more natural forefoot movement and fluidity