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 sole 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 silicone to optimize water flow and propulsion. 3. Comfortable Fit: Built with durable, high-toughness material resistant to aging. The soft foot pocket offers flexibility for barefoot use and is compatible with fin socks or dive booties for added comfort and protection. 4. Compact and Travel-Friendly: Short blade design ensures lightweight and compact dimensions, making them easy to pack for travel. Suitable for use in pools or open water environments. 5. Enhanced Swimming Performance: Channeling design helps direct water flow, improving propulsion and swimming efficiency. Specifications: Sizes Available: S: Foot Length 48.5 cm, Recommended Size 36-37, Weight 380g, Dimensions 48.5 cm x 19 cm M: Foot Length 50.5 cm, Recommended Size 38-39, Weight 420g, Dimensions 50.5 cm x 24.5 cm L: Foot Length 53 cm, Recommended Size 40-41, Weight 480g, Dimensions 53 cm x 26 cm XL: Foot Length 55.5 cm, Recommended Size 42-43, Weight 535g, Dimensions 55.5 cm x 27 cm Package Includes: 1 x Diving Fins