Bestway Swim Safe Boys/Girls Swim Jacket. Comfortable knitted fabric. Built-in foam pads. Attractive graphic design. Adjustable buckles and strap. Tested buoyancy. Elastic webbing. Durable, auto-lock zipper with flap protection when closed. Weight: S/M - 20-33 lbs (9-15 kg), M/L - 33-55 lbs (15-25 kg). Recommended for ages 2-4