Air tank pouch - fits all CO2 tank sizes, 48ci and 68ci * Vertical 4x MOD Paintball Pod Pouch - add this pouch to hold 4 additional pod vertically * Web Belt - add this web belt if you have leg rigs or other leg or pouch attachment * 4x Horizontal Pod pouch - add this pouch to hold 4 additional pod Horizontally * Water Reservoir - add this water bladder and your vest able to carry 2 litter of H2O