In the interest of durability and support, with this Siren Ventilator by Merrell we stopped just short of nothing but net. But a breathable mesh upper and mesh lining go with the flow. Thin, sculpted leather strapping provides lightweight but effective soft buttressing. Merrell’s proprietary combination of women-specific Q-Form™ alignment in an Air Cushion® Midsole smoothes out footstrike and improves stride efficiency. End Uses: Light hiking or biking on trails or urban terrain in dry, warm conditions. Best worn with mid to light weight socks. - Slip Lasted Construction - Full Grain/Synthetic Leather and Breathable Mesh Upper - Breathable Mesh Lining - TPU Injection Molded Heel - 4.5mm Anatomical Footbed - Nylon 6.6 Injection Molded Arch Shank - Q-Form™ Triple Density Compression Molded EVA Footframe - Air Cushion® Midsole - 5mm Sole Lug Depth - Vibram® Siren™ Sole/TC5+ Rubber Women’s Sizes: 5-11 Weight: 1 lb. 6 ozs.