SwimSchool Swim Trainer Vest, Sun Protective Sleeves, Adjustable Safety Strap, Small/Medium, Up to 33 lbs.,  Blue From Aqua-Leisure, the worlds most trusted line of swim training aids. SwimSchool level 2 - safely & easily build water confidence Built to the high standards for enhanced strength, durability and comfort Available in 2 sizes: Small/Medium - 20-33 pounds medium/large - 33 - 55 pounds