The cutting-edge XT4 Second Stage is paired with the tried-and-true XT1 First Stage to create an updated sidemount regulator package that will improve your ease of breathing underwater. Offering an exceptionally low work of breathing in a compact design, the XT4 will be there for you on your most demanding dives. Comes with a carrying bag for transport to and from the dive site. Available in yoke or DIN. Available in RL or RR.