UNLIKE OTHER BABY SWIM SHIRTS WITH LOW QUALITY FABRIC THAT WEARS TERRIBLY AND STRETCHES OUT EASILY – defeating the purpose of using a skin-protecting swim shirt in the first place – the Nageuret Sun-Protective Swim Shirt was designed using PREMIUM, TEAR-RESISTANT MATERIALS. With 82% nylon and 18% spandex, our baby girl & baby boy swim shirt is the baby swimwear for 100% FUN AT THE POOL AND BEACH!