Open and airy precision knit mesh with stretch collar and fabric heel tab.Arch supporting high density Open Cell PU foam allows air to flow for a cooler, healthier footbed.The lightweight TravelTek™ outsole combines EVA and rubber for long lasting wear and a deep tread pattern for traction.FlexibleRemovable footbed Precision Knit Mesh Upper Microfiber Sock Lining TravelTek™ outsole combines EVA and rubber Outsole Sneakers available in sizes 6-10, 11, 12 M; 6-10, 11, 12 W; 6-10, 11, 12 XW; 6-10, 11 XXW