Specification: Material: Nylon & Polyester & Elastic fiber Size: Length 85cm, width 8cm Color: Blue, Orange, Grey Fit both left and right foot Fit different size foot Features: Adjustable Tightness Easy-to-use crisscross Hook strapping attaches anywhere along the entire sleeve. One size fit all We use high quality elastic nylon material, Hook strapping attached design, fit different size foot, fit left and right foot at the same time.