Material: Eco-friendly PVC + EPE foam Uses: Provides buoyancy support for the waist and neck Applicable scenes: Rivers, lakes, swimming pools, and other water environments Neck ring size: Size – Outside Dimensions – Inner Diameter – Circumference L – 40 x 32 cm – 12 cm – 37.68 cm XL – 40 x 32 cm – 14 cm – 43.96 cm 1. Comfortable: User-friendly design offers a comfortable fit, secure closure to help prevent falling off, providing added safety. 2. Smooth Seam Design: Inner seam construction helps prevent skin scratching, offering a smooth and comfortable feel. 3. Portable: Compact size with high buoyancy, allows freedom of movement in water without restricting hands or feet. 4. Ideal for Water Activities: Perfect for children's summer fun, pool parties, and recreational swimming. Add color and enjoyment to your time in the water. 5. Comfortable Fit: High buoyancy, close-fitting design resists deformation and fading. Integrated construction provides even buoyancy distribution.