【Durable PVC Material】Made of environmentally friendly, thickened PVC with a thickness of 0.22mm, ensuring resistance to pressure and long-lasting durability. 【Ergonomic Design】Shaped to fit the human body structure and adapt to water flow changes, providing optimal comfort and stability while swimming. 【Enhanced Buoyancy】Engineered with a mechanical structure that offers excellent floating ability and weight-bearing capacity, ensuring stable flotation. 【Leak-Proof Construction】Features an independent air chamber design with a secure air valve, significantly improving safety and preventing air leakage over extended periods. 【Adult-Sized Comfort】Ideal for adults aged 16 and above, weighing between 50-75 kg, providing a perfect fit for mermaid-themed swimming activities. Specifications: Material: PVC Thickness: 0.22mm Before inflation: outer diameter: 83cm, inner diameter: 24cm After inflation: outer diameter: 75cm, inner diameter: 35cm Recommended age: 16 years and above Recommended weight: 50-75kg