The Apollo SV-2 is one of our best selling masks. The SV-2 is a low volume twin lens mask which provides a wide field of vision. The push button buckles on the mask strap make this an easy mask to adjust for best fit. The SV-2 comes in either a black or clear silicon skirt. Both of these skirts feature the double flanged design for better sealing. This is a great fitting, durable mask and can be fitted with corrective lenses.