Made of PPand TPR,Adjustable Open Heel Design, Good for Sharing.Wears Comfortably, Support Various Way to Put On.This short fins is an excellent choice for avid travelers,making it ideal for packing with ease. And it is a useful swimming aid either for pool or sea swim enthusiast, bodyboarders and snorkelers. Soft heel straps with large thumb loops, giving you easy one-time adjustment and allowing you to easily put on and remove the fins.17"*8.2"*2.75".