Material: EVA Package List Due to the different monitor and light effect,the actual color maybe a slight different from the picture color.Please allow 1-2cm differs due to manual measurement. 1The swimming float is made of environmentally friendly EVA material with high buoyancy, which is very suitable for beginners, adults and children. 2Unlike swimming armbands, you will feel more comfortable when wearing a swim belt back float. They will feel less restrained and hence they will be able to move more freely. The kids enjoy the water experience even the more since their hands are free to make various strokes. 3If you would love to see your kids learn swimming in a more comfortable and safer way, a swim belt is a great choice. You can also use the swim belts to help kids them improve their abilities to stay afloat. By removing one block at a time when you notice some improvement until you can eventually remove all of them. Wait until the kids are confident enough to swim on their own. 4With the aspects of swimming safety taken care of, next in line will be improvements in the swimming technique of your babies. A high quality swim belt helps the kids to improve their swimming skills.