1、Robust side rails to channel water and pre-bent design to execute natural draft. 2、Soft shoe with easy to adjust strap. 3、Soft short blade and elastomer boot that can be put on quickly and easily. 4、Perfect for snorkeling or swimming. 5、Size Reference: XS/M: 4-8(US), 36-41(EU), 22-25(JP); M/L: 9-13(US), 42-47(EU), 26-29(JP). The fin is the perfect blend of style and function. Stylish adjustable heel improves comfort. Features: Size reference: XS/M: 4-8 (US), 36-41 (EU), 22-25 (JP); ML/XL: 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. Specifications: Brand: WHALE Type: Snorkel Fins Material: PP + TPR Color: Black / Red / Blue / Yellow (Optional) Size: XS-M / ML-XL (Optional) Fin Size: 340 * 172mm / 13.4 * 6.8in Package Size: 38 * 19 * 9cm / 15 * 7.5 * 3.5in Package Weight: 850g / 1.9lb Package List: 1 * Pair of Fins Notes: 1. Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. 1 * Pair of Fins Notes: 1. Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.