Double Safety Anti-Slip Design: This swim vest features double adjustable safety buckles on the shoulders to prevent children from opening them themselves and effectively avoid accidental slippage. The shoulder straps prevent slipping, and the adjustable crotch straps ensure a comfortable fit while playing in the water. Two Ways to Wear, Suitable for Children of Different Ages and Swimming Levels: Designed with two ways to wear it, suitable for children of different ages and swimming levels. Beginners can use the crotch straps for added stability, while older children can remove the crotch straps for greater freedom of movement. This versatile vest accompanies your child's growth, from a swimming beginner to a confident swimmer. Buoyancy Swim Vest Suitable for Children Weighing 22-66 lbs (approximately 10-30 kg): Provides stable buoyancy to help children learning to swim develop water skills and boost their confidence. Suitable for children weighing 22-66 lbs (approximately 10-30 kg) and aged 1-7 years, with fully adjustable shoulder straps. Weight: 0.68 lbs.