ATOMIC SV1 - Editor's Pick - March 2009 COOL FACTOR SV stands for "scupper valve." KEY FEATURES The magic behind the SV1 snorkel is an additional tube inside the lower breathing tube. This scupper valve allows water washing down the barrel to bypass the mouthpiece without getting inhaled. Below the scupper valve is a regular purge valve, and with every exhalation, any accumulated water is expelled. A flared top maximizes airflow, and down below, a rotating mouthpiece can be easily positioned for a perfect fit. MSRP $55 CONTACT atomicaquatics.com