Two narrow straps rather than one wider strap allows the ZX/1 Unaweep sandal by Chaco to more accurately conform to the curvatures of your feet. An attractive addition to our Performance line inspired by the classic basket weave. Features: Strap Width:8.5mm. Approx. Weight:(Size 8) 22oz (620g). Sole: Unaweep - Advantages: They have taken the most intelligent features from our Colorado and Terreno soles. With Vibram durability, the Unaweep outsole is a great combination of slip resistance, traction and light weight. Lug pattern and spacing makes this sole virtually self-cleaning.