Atomic Aquatics SV2 SnorkelSemi Dry Flex Snorkel The SV2 is designed to limit splashed water from entering the breathing tube, by combining the Scupper Valve lower section with the sleek looking SV2 Semi Dry top. SV2 is the perfect snorkel for rough or choppy water conditions. SV2 FLEX: HIGH PERFORMANCE DESIGN WITH A SEMI DRY TOP The SV2 includes a Scupper Valve lower section with a sleek semi dry top. The SV2 semi dry top employs horizontal vents engineered to diffuse splashed