Speedo Boys UV50 Neoprene Swim Vest - Shark; Size Medium; Ages 2-4; 33-45 lbs Kid's Size Medium; Ages 2-4; 33-45 lbs; Chest 22" UV50 Neoprene Swim Vest; Swim Level 2- Toddlers and kids who are dependent on an adult for full flotation support but developing swimming skills. Provides warmth and UV50+ protection so little swimmers can enjoy the water longer. Safety leg strap provides snug, secure fit. Front zipper for easy on and easy off.