Variable stretch knit mesh adapts to the shape of your foot which means flexible movement and comfort all day.Open cell PU foam allows air to flow for a cooler, healthier footbed. Plus our embedded EVA cushioned board for comfort.The lightweight TravelTek™ outsole combines EVA and rubber for long lasting wear and a deep tread pattern for traction.Stretchable Flexible Stretch Knit Mesh Upper Microfiber Sock Lining TravelTek™ outsole combines EVA and rubber Outsole Slip-On available in sizes 6-10, 11, 12 M; 6-10, 11, 12 W; 6-10, 11, 12 XW; 6-10, 11 XXW