BREATHES JUST LIKE A PRIMARY This isn’t your normal safe second/inflator combo. The Atomic SS1 is a fresh innovation on a longtime concept as Atomic engineered a new level of performance. While others prioritize the convenience, Atomic placed equal importance on superior materials, reliability and high-performance natural breathing. The SS1 fits virtually any BCD on the market today and actually breathes like a primary. This product is not stocked in-store, but is available for special order. Please allow an additional 2-3 days delivery