Fishtown Training Swim Fins - All Sizes, High Performance Swim Fins for Beginners, Comfortable Ergonomic Design, Lightweight and Flexible, Improves Technique and Muscle Strength, Adjustable Strap ERGONOMIC DESIGN - The contoured foot opening, adjustable swimming fins strap, and rotating "smooth action" hinge post ensures long-lasting comfort. Long sole plate reduces foot strain while delivering additional kicking power. LIGHTWEIGHT DURABLE MATERIAL - Constructed of ultra-durable recyclable polypropylene. Open heel swim fins resist cracking and sun fade for years of continued use. PERFECT FOR BEGINNING SWIMMERS - Ideal swimming training fins for swim teams, snorkeling, body surfing and scuba diving. Builds endurance, confidence and strength. COLORS AND SIZES - Fins for swimming for adults and children. Adult sizes S-M ( US Men 6-8"; US Women 7.5-9.5 ") Children sizes S-M (2-4 Years old; US 10 ") L-XL (4-8 Years old; US 13") Adult color choices: black, blue, and yellow. Children: black, blue, yellow and green SATISFACTION GUARANTEED - If you are unsatisfied with your Fishtown Training Swim Fins for any reason, please send it back for a full refund!!!