This is the Bare Kids 1mm Dolphin Floaty Suit Float Wetsuit Toddlers Swim Flotation Snorkeling Features: 1mm neoprene upper body Removable flotation panels Can be used as a swim trainer or just for buoyancy and added safety 50+ UV protection - highest available 6oz UV Nylon/Spandex fabric in arms and lower body Wind shield and abrasion protection Flatlock construction for comfort and stretch Sizing Size 2 Height 2&';10-3&';2" / Chest 20"-23" / Weight 30-40 lbs Size 4 Height 3&';4"-3&';8" / Chest 22"-24" / Weight 40-50 lbs Size 6 Height 3&';10"-4&';2" / Chest 24"-26" / Weight 45-60 lbs The Dolphin offers UV protection, flotation, and a swimming aid all in one. The flotation panels can be removed as the child&';s swimming skills improve and the Spandex lower body stretches to accommodate a variety of size and diapers.