The XT1/XT4 Advanced Open Water Regulator Package is made up of Dive Rite’s high performance XT1 First Stage and a matched set of balanced XT4 Second Stages. 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.