The knitted material on the outside is supple and comfortable, while the foam cushions on the inside float on the water surface. The buoyancy has been intensively tested, but also the high UV protection UPF 50+ provides protection against sunlight. The adjustable buckle with straps allows you to loosen or tighten the vest for size adjustment. In addition, a sturdy, self-locking zipper with protective screen ensures safety. This Medium/Large life jacket has the perfect size for children ages 3-6 years with a weight of 18-30 kg. Integrated foam cushions. Buckles and straps can be adjusted. Buoyancy tested. Durable zipper with automatic lock when closed. Note: Item is assorted.