The RX Mask from Genesis blends high-performance with high fashion. Lenses are carefully crafted of tempered glass to provide safety and optical clarity. The Crystal Clear silicone skirt assures a precise, comfortable fit. The RX also gives you a wide selection of fashionable frame colors. Genesis Scuba uses advanced materials and technologies to create masks that delivers an unsurpassed level of fit, comfort, and beauty. The Genesis RX is designed to provide optical clarity while fitting a wide variety of facial structures. CRYSTAL SILICONE SKIRT: The double feather edged skirt of the mask is made of the highest grade crystal silicone to provide a snug, watertight fit while also delivering true comfort. QUICK-DISCONNECT BUCKLE: Non-slip double strap and quick-adjust spring-less strap buckles allow easy adjustments, even underwater. Plastic Storage Box included with each mask!