The fin is the perfect blend of style and function. Stylish adjustable heel improves comfort. Features Size reference XSM 4-8 US, 36-41 EU, 22-25 JP MLXL 9-13 US, 42-47 EU, 26-29 JP. Sturdy side rails to channel the water pre-bent design for a natural kick. Soft foot pocket with easy-to-adjust strap. Soft short blade and elastomer foot pocket able to be put on quickly and easily. Accommodates 4-5 consecutive sizes and can be worn over thin footwear. Perfect for snorkeling or swimming. Spe