Features: Material：PC and Silica Gel. Package Included:1 x swimming goggles Size: 130x33mm (adjustable) Excellent fog effect protected and clear view polycarbonate lenses resistanceProduct Description:1.enses by hand or hard materials.2.Before use ,adjust the nose-belt and band for water proof and comfortable wear3.To enhance the fog effect, dip the lenses in clear water for a few seconds before use4.After use ,clean it in clear water and keep it in a cool place5.After use ,clean it in clear water and keep it in a cool place.6.dive it in the deep water ,as it can cause painful pressure on your eyes