Companion BC
By adding a compact wing to the Pony Pac, you have the Companion BC, an ultra-compact travel BC. The Companion BC is 40% lighter than traditional BCs weighing in at only 5 lbs (2.3 kg). Take advantage of the versatility that a removable air cell can offer.
Back inflation design with 30 lbs (13.6 kg) of lift
Two trim pockets, with hook and loop release tabs, hold up to 5 lbs. (2.3 kg) each
Includes two standard length tank cam straps (p/n BP500)
Fits cylinder diameters of 6.9 - 8.0” (175 - 203 mm)
Rear pull dump on lower, right side
Removable epaulette (airway hold down)
Knife mounting grommets are ideal for Rook Knife (p/n KN500)
Two-way adjustable sternum strap
Extra-large thumb loops for cinching down shoulder straps
The Companion comes in 3 sizes: 
Small - p/n BC503C
Regular - p/n BC507C
X-Large - p/n BC509C