ScubaLab put eight new regulators through breathing simulators in Panama City Beach and a full round of diver testing at Blue Grotto, and the SCUBAPRO MK11 EVO/C370 rose straight to the top. Scubapro The updated first stage uses a double spring layout that keeps things compact while boosting performance, and paired with the C370 it delivered consistent results across every depth and breathing rate we threw at it. Test divers called it soft, smooth, quiet, and reliably dry, with a powerful purge