Soft and comfortable swim vest made of woven polyester and soft nylon fabrics, skin-friendly and flexible. Features arm wings with safety buckle at the back that prevents children from opening it alone. Adjustable strap fits sizes 30-50 lbs for ages 1-6 years, also suitable for 20-30 lbs. No inflation needed, simply pull over arms and buckle up. Helps children learn to swim, providing balance and confidence in water for use in pools, beaches, and lakes. Includes storage bag for easy carrying. Weight: 0.53 pounds.