With the mission is to provide fun, safe and innovative recreational products to the whole family. Our swim shirts support and balance your child to learn the position before swimming: straight float and learn forward, build a swim skill. size: M -- age: 2-4years. 9-15 Sep (20-33 lbs) L -- age: 4-6yrs weight capacity: 15-25g (33-55 lbs) features: UV50 + prevents harmful UVA & UVB burns of sunlight, soft and durable neoprene structure for warmth and floats, floats for learning pre-swimmingdesign, zipper design to open and close easy warning: this is not a lifesaving device. don't leave the child without one taking care of it while using. the device is not recommended for children under 2 years old.