Op Boys Swimsuit Foam Padded Bathing Suit Floatation Trainer Medium Large M-l Boys 33-35 Lbs. 22 Inch Chest Water Safety Floating Buoyant Swimming Training Suit FLEXIBLE FOAM PADS 50+ UPF highest level of sun protection EASY ON/OFF DESIGN M-L 33-35 LBS., 22 INCH CHEST Approx 3-6 yrs old; S-M 20-33 LBS., 20 INCH CHEST Approx 1-3 yrs old Safe water experience for kids that helps the kid to build up confidence in the water