Product Name: Adjustable Open Heel Diving Fins for Swimming and Snorkeling Features: 1. Adjustable Open Heel Design: Ergonomically designed for strong stability, improving swimming performance. The non-slip bottom enhances joint flexibility, supports efficient kicking, and helps reduce leg fatigue. 2. High-Performance Material: Upper made from TPE material with low water absorption, shock resistance, heat insulation, and moisture resistance. The blade is constructed from dual-density engineering material combined with a silicone-based component to create a channeling effect for improved water flow. 3. Comfortable Fit: Built with high-toughness, durable, and aging-resistant material. The soft foot pocket offers flexibility for barefoot use and is compatible with fin socks or dive booties for added protection against cold and blisters. 4. Compact and Travel-Friendly: Short blade design ensures lightweight and compact fins, ideal for travel. Suitable for use in pools, open water, and snorkeling activities. 5. Enhanced Swimming Efficiency: Diversion ditch design helps redirect water flow, contributing to improved propulsion and swimming efficiency. Specifications: Sizes Available: S: Shoe Length 48.5 cm, Recommended Size 36-37, Weight 380g, Dimensions 48.5 cm x 19 cm M: Shoe Length 50.5 cm, Recommended Size 38-39, Weight 420g, Dimensions 50.5 cm x 24.5 cm L: Shoe Length 53 cm, Recommended Size 40-41, Weight 480g, Dimensions 53 cm x 26 cm XL: Shoe Length 55.5 cm, Recommended Size 42-43, Weight 535g, Dimensions 55.5 cm x 27 cm Package Includes: 1 x Diving Fins