Swim shoes made of 95% polyester and 5% elastane The stretchy fabric protects against the sun�s UV rays with the highest ultraviolet protection factor, UPF 50+. CE Size guide: 20-21: 12.7 cm 22-23: 14 cm 24-25: 15.3 cm 26-27: 16.7 cm 28-29: 18 cm 30-31: 19.3 cm