Orca Hyrdo Neoprene Thermal Non-Slip Booties | 2021 | Black These booties are designed with 100% Neoprene for ultimate warmth and maximum flexibility. This ultra flex makes swimming with boots as easy as eating chocolate and the split toe design helps keep you stream lined and buoyant. A silicon grip has been placed on both soles as to prevent slipping and hurting yourself when entering and exit the water. The boots have adjustable ankles and are easy to put on and take off! Features  100% Neoprene 3mm neoprene for increased warmth  Split toe design adjustable ankles  silicon grips on the sole.