Under Armour Micro G Assert IV Trail Shoe - Women's Synthetic-and-mesh Upper: Textured rip stop upper offers superior durability without sacrificing breath ability Structured overlays deliver midfoot extra support Midsole: Full-length Micro G midsole creates an incredibly lightweight and responsive ride Footbed: Full-length 4D Foam sockliner conforms to your foot's exact shape, eliminating slippage Outsole: Off-road inspired outsole rubber that provides the ultimate in lightweight traction out on the trail