Swimwear is lined when a thin swim lining on the inside in either white or neutral color. They are made of 86% polyester 14% spandex fabric with a nice stretch to them.Fringe top: halter style top with fringe tie at neck and around waist. Skirt: fitted briefs with skirted with yoga style waist band and band cuffed legs. Rash guard top: slightly fitted great for day a day beach pairs perfect with boys swim shorts or girls bummie swim bottoms. Euro swim shorties: fitted with elastic waist and faux drawstring (great for boys). Swim briefs: fitted with elastic waist and elastic leg. 1 piece suit: lined suit with bands at leg opening for comfort. This item is made of thread and nylon spandex.