PC Anti Fog Lens: This swim mask chooses clear thickened PC to withstand deep water pressure for all types of diving or swimming. Clear lens provides a clearer view underwater. Anti fog: Snorkel Diving Mask Anti fog treated PC lenses mean you'll have a clear underwater experience without blurring or distortion. Provides better visibility underwater. Nose Cover: Swimming mask is with nose cover, which is needed to compensate for increasing pressure as swimming, snorkeling or diving. Also it is helpful for those who do not know how to stop breathing by nose underwater. Perfect for snorkeling and recreational swimming. Soft Silicone: Leak , comfortable seal skirt and strap adopt soft silicone, which are made to the shape of your face for comfortable fit and watertight seal. no more or discomfort. Easy head strap adjustment: mask for men and women kids unisex. The straps of scuba diving mask can be adjusted easily. Specification: Material: PC and Silicone Size Chart: Overall:20cmx18cm/7.87inchx7.09inch S silicone skirt: 11cmx12.2cm/4.33inchx4.80inch L silicone skirt: 11.8cmx13.7cm/4.65inchx5.39inch Package Includes: 1 Mask 1 Snorkel 1 Action Camera Mount 1 Screw Nut 2 Earplugs 1 Silicone Stopper 1 Storage Bag 1 Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping