Yosoo Mermaid Tails Swim Fin Swimming Monofin Flippers for Kids Girls Youth Adult Swimming Strength Training Comfortable And Durable Ideal for Children to Increase Water Confidence Yellow Adjustable quick release neoprene foot strap. Mermaid Fin Flippers for kids and youth, comfortable and durable. Mermaid Fin Flippers for Adult, comfortable and durable Fit shoe sizes EU 34 to 40 (through adjustable strap) Soft material makes the child more comfortable when you wear