Tuga Boys Thermal Wetsuit 1-14 years, UPF 50+ Sun Protection Body: 1.5mm 100% Neoprene. Sleeves/Collar: 80% Nylon/20% Spandex. Imported Kids one piece wet suit provides core body warmth with 1.5mm neoprene and is perfect for cold weather, swim lessons, indoor pools. SIZING: Please see size chart to left, last image in product photo sequence. EXCELLENT SUN PROTECTION: Swimwear fabrics are rated UPF 50+ and provide maximum UV sun protection by blocking 98% of UVA + UVB sun rays, wet or dry; similar rating as SPF for sunscreens. Covered areas don't need sunscreen. SAFE: Tuga bathing suits are made from fabrics that are free of sunscreen chemicals, great for sensitive skin. We make skin safe and reef safe products! PRODUCT FEATURES: Short sleeves, easy on/off durable front zipper with zipper flap to protect delicate skin, spandex sleeves provide flexibility and free arm movement QUALITY + COMFORT: Swimsuit with flat lock stitching for extra durability, 4-way stretch and quick drying fabrics for ultimate comfort at the beach, pool, and pretty much anywhere.