Material: Eco-friendly PVC + EPE foam Uses: Used to provide buoyancy to the waist and neck Applicable scenes: rivers, lakes, swimming pools, etc. Neck ring size: Size Outside Dimensions Inner Diameter Circumference L 40 * 32cm 12cm 37.68cm XL 40 * 32cm 14cm 43.96cm 1Comfortable: User-friendly design, more comfortable to wear, safe lock, never fall off, safer. 2 Exquisite Wiring Design: Seam inner line to prevent scratching, intimate and beautiful, more comfortable. 3 Portable: Small size, large buoyancy, no binding between hands and feet, playing in the water, swimming more freely. 4 Great for Water Sports: Great for kids summer fun, summer pool parties, Use these colorful ring floats to add more fun to your summer 5 Comfortable Fit: Super buoyancy, comfortable and close-fitting design, no deformation, no fading, integrated design, more uniform buoyancy.