Convenient and versatile design The quick release buckle design makes it easier to put on and take off your fins. The product includes two buckle sizes, 16mm and 20mm, to fit fins with different connection sizes. Swift and reliable fastening Quick release buckles enable swift on/off for fast gear changes and improved convenience during activities. Durable, skinfriendly materials The Adjustable Anti Loose Quick Release Buckle Universal Fin Frog Shoe Heel Strap is made of TPR and PVC. These materials are environmentally friendly and skin friendly, resistant to aging, and stay flexible even in low temperatures. What you get Each package contains a pair of straps. Note: due to their larger size and weight, these straps may not be suitable for smaller or lighter fins where the size and weight may not be balanced. Compatibility and performance Adjustable antiloose quick release buckle and universal fin frog shoe heel strap design for broad compatibility and secure fit. Use scenarios Snorkeling or recreational diving with fins that use quickrelease buckles, where easy on/off saves time and effort. Coldwater activities, where material flexibility helps maintain comfort and performance. Travel, rental, or training environments requiring rapid adjustments and quick gear changes. Note Please be aware that the straps' size and weight may not balance well with very small or light fins.