Reliable Material: these back float swim trainer is made of quality EVA foam, soft and smooth, solid and sturdy, lightweight and stretchy, not easy to break, tear, deform or fade, can be applied for a long timePackage Includes: you will receive 3 pieces of swim belts for kids in blue, each belt contains 6 pieces of foam, enough quantity to meet your using and replacement needs, you can also share them with your familySize Information: each child flotation belt measures about 7.09 x 3.35 x 4.72 inches/ 180 x 85 x 120 mm, and each foam is about 4.72 x 3.15 x 1.18 inches/ 12 x 8 x 3 cm, proper size for most kidsWide Application: this water aerobics equipment is an ideal accessory for many indoor and outdoor occasions, such as swimming pool, lake and so on, creating unforgettable memories for youAdjustable Design: this kids swimming belt features delicate workmanship, designed with an adjustable strap, you can adjust the length according to your waist, so you will not feel too tight or too loose, offering you a comfortable wearing experience