85%Polyester/15%SpandexZipper closureOEKOTEX-100 Certified Fabrics (free from harmful chemical residues);Transparent ManufacturingUPF 50+ SUN PROTECTION – Made of fabric conforming to Australian standard for sun protection clothing AS/NZS 4399. The UPF reaches the highest standard UPF 50+. It can effectively block more than 97.5% of harmful ultraviolet rays. Either at the beach or in outdoor pools, it can effectively prevent ultraviolet rays.USING ZIPPERS – Using zippers, with cloth from top to bottom between zipper and skin to avoid direct skin contact. The length of the zipper is 2-3 cm from the neck to the navel. Easy to wear and take off, and won??t easily fall off. Better protects the babies from catching cold or exposed to the sun in exercise.4WAY STRETCH FABRIC – The 4WAY stretch fabric was woven from polyester and nylon. It has very strong stretchability, and can stretch horizontally, vertically and obliquely, which allows the babies to play freely without affecting exercise.CHLORINE-RESISTANT AND WASHABLE – After being washed for more than 50 times, it can still keep the ultraviolet blocking rate above 97.5%. The swimsuit is made of chlorine-resistant fiber fabric, which can still be used even in a swimming pool containing chlorine.