With a freedom-feeling flat footbed and VibramA(R) Megagrip outsole, the Cairn Evo PRO keeps you sure-footed no matter where you wander. The unique hook-and-loop strap design ensures a super secure fit, even when adventures get messy. Features and Specs Patented G-hook-and-loop heel and front strap system create an extra secure foothold that won&&';;t gum up in mud or pull off in whitewater. The Evo PRO&';s minimalist footbed conforms to your feet for superior ground feel, flexibility, and packability. 1% For the Planet: We proudly donate 1% of your purchase to environmental non-profits. Upper: Premium polyester and nylon Webbing Outsole: Ultra Grippy VibramA(R) Megagrip Strap System: Bedrock&';s Patented Y-Strap 3 point adjustment system with Whitewater grade Heel-Hook strap Weight: 7.9 oz per size 9 sandal Stackheight: 14mm stack height, zero drop Underfoot: Flat + minimalist EVA foam footbed Manufactured: US Assembled of Foreign Parts