Reebok Lady Premier Flex IV GORE-TEX Trail Shoes Synthetic Mesh/synthetic upper - offers the ultimate in breathability, comfort and durability. The shoe keeps your feet cool and last longer through the extra durability. Gore-Tex Lining - for waterproof protection with advanced breathability to help keep your feet cool. DMX Ride enhanced cushioning system - Designed for lasting comfort, exactly what you need when running long distances. Removable Ortholite foam sockliner - for the ultimate in comfort and cushioning, accommodates orthotics; enhanced rubber toe and heel for added abrasion protection; lugged outsole for enhanced traction