Functional fabric: An environmentally friendly material consisting of 80% polyamide and 20% elastic fiber. The swimsuit forms a warm layer effect, which can alleviate the discomfort of the child when the child enters the water, and can protect the child from the cold when coming out of the water. The second layer of skin: the swimsuit is like the second layer of skin, which can reduce the impact on the skin when entering the water, and can protect the body from being scratched by rocks, debris and the like in the water. DURABLE AND FLEXIBLE: Highly chlorine and salt resistant fabric, low water retention and extremely quick drying. Four-way stretch and shape memory. Highly elastic fabric for a comfortable fit. EXCELLENT SUN PROTECTION: Boy Sun protective swimsuit fabrics are rated UPF 50+ and provide maximum UV sun protection by blocking 98% of UVA + UVB sun rays, wet or dry。 The swimsuit covers the main part of the body to prevent sunburn from the skin caused by excessive outdoor sports or water sports. Machine washable. Boys Swimsuits Set 2 Piece Swimwear Kids Rush Guard Short Sleeve Swim Clothing 1. Please note the product size description. If your child grows faster than his/her peers. it is recommended to choose a larger size. 2. Boys swimsuits set are made of environmentally friendly material, comfotable, breathale and soft. Ideal for children in school swimpool beach and more. 3. The design of this kids swimsuit set is very classic, very good with clothes, your child will be very happy to wear. Please select the size according to the SIZE CHART. Tag Size:7-8 /51.2"(inch)/130cm----Shirt Length:20.5"(inch)----Chest:28.3"(inch)----Waist:22.8"(inch) Tag Size:9-10 /55.1"(inch)/140cm----Shirt Length:21.7"(inch)----Chest:29.9"(inch)----Waist:24.4"(inch) Tag Size:11-12 /59.0"(inch)/150cm----Shirt Length:22.8"(inch)----Chest:31.5"(inch)----Waist:26.0"(inch) Tag Size:13-14 /63.0"(inch)/160cm----Shirt Length:24.0"(inch)----Chest:33.1"(inch)----Waist:27.6"(inch)