Product Name: Optical High Quality Silicone Diving Masks (OPT-2600) Model NO.: OPT-2600 Gender: Unisex Usage: Diving Material: Silicone Type: Diving Mask Trademark: WHALE Transport Package: Blister Package; Hard Case, etc Specification: CE Origin: Shenzhen HS Code: 3910000000 Product Description Material: Lens: Tempered glassSkirt: Silicone+paintingStrap: Siliconeframe: PCFeature: High quality silicone skirt and strapDesigned to fit a wide range of facial profile with comfortOptocal detachable corrective lensesAvailable in diopter from -2.0 to -6.0, in 1.0 incrementsTempered glass lens, Silicone & PVC skirt available. 1. The unique design of the mask allows divers to experience the greatest viewing angle in every direction2. Anatomic skirt in liquid silicon gurantees fit, comfort and seal. 3. Utilization of the innovative design, buckles make adjusting the split strap fast. 4. The lens exceeds the impact test requirements of the American National Standard Z86.11-19855. Come in a large offer of color-combinations of rubber coating. 6. Supple hypoallergenic liquid silicone skirt. 7. Designed to fit a wide range of facial profile with comfort. 8. Changeable ornamental pieces provide multiple color combinations for divers. 9. Different colors for choosing.