Body Glove Mermaid Linden Child's Pro 2 Springsuit Wetsuit Should fit snug, but not too tight 6 oz. Spandex throughout Heavy duty front zipper with super long strap for easy entry & exit Flatlock stitching, anatomically cut for greater fit Available Size: S (20-30lbs), M (30-40lbs) and L (40-50lbs) Body Glove quality and design over 60 years in the water