Yosoo Adjustable Mermaid Swim Fin Kids Girls Mermaid Monofin Flippers Real Swimmable Mermaid Tail Soft strap comfortable Adjustable swimming fins. Increasing water confidence and quick release foot strap. Fits shoe sizes boys1-6T, girls 2-8T, suitable most of kids. It comes with a comfortable TPR foot pocket and uses a quick-release foot strap so that feet can quickly be removed from the fin for safety. It keeps a balanced dolphin kick