Two narrow straps rather than one wider strap allows the sandal to more accurately conform to the curvatures of your feet. An attractive addition to Chaco's Performance line inspired by the classic basket weave.Strap Width: Men's 13mm and Women's 8.5mmApprox. Weight: Men's size 9 29oz (820g), Women's size 8 22oz (620g)Unaweep Sole: 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.