Baby Swimming Goggles Children Diving Glasses Professional Indoor and Open Water Swimming Sports for Kids Materialpolycarbonate Safety lens for crystal clear vision. Soft comfortable eyecups fit for all faces. It is essential adjust the nosebridge so that you can have a comfortable and water tight fit. Adjust the tension of headstrap more tightened does not mean better seal.it not only fit for baby but also fit for adult. With both hands holding the goggles frame firm palce the strap on the back of the head.note:(EUB,USPS with tracking No., 8-15 Business days for delivery if the price more than $6.99,3 months guarantee resend or refund if the item has any problem.pls kindly add the item in wish list if you like, we will irregular Promotions.)