Fasten Girls One Piece Swimsuit (Opens at Waistline with Magnetic Snaps) 80% nylon; 20% spandex Made in USA Hand wash in cold water with mild detergent. Drip dry or hang flat to dry after each use. Do not use bleach or Woolite. If you choose to use the hand-wash setting on your washing machine, make sure to wash with other garments to prevent swimwear from sticking to the inner drum. Wash before first use. If unable to wash swimwear soon after swimming, rinse under cold water to remove excess saltwater or chlorine. 80% nylon; 20% spandex fully lined hand wash; line dry proudly made in the USA FASTEN cuties were able to SWIM and PLAY normally during our design and testing phase (they even went down waterslides!)