The most secure and light-weight sandal we offer! The Updraft X2 has delicate double straps that cradle your feet in a customized fit, while the LUVSEAT platform supports you in soft polyurethane comfort. Polyester webbing. TPU frame with ergomonic support posts for light-weight fit. LUVSEAT X03 platform. Custom Adjust’em Fit. Vibram Bulloo outsole. Non-marking.