Sherwood Blizzard Reg Set: Breathes comfortably under high demand conditions Dry Air Bleed System, Prevents internal contamination and improves reliability, resists freezeup Balanced high flow, first stage moving orifice, maintains consistent air pressure in second stage, even at low tank pressures for comfortable breathing Sherwood Blizzard 1st & 2nd Stage Sherwood Minimus Octo Sherwood Gauge Set