Thermobak Mil Spec Short CruxA new low profile solution that optimises the space on your back by using a wider, shorter reservoir pioneered by the USMC. The ThermoBak 3L offers the same features and functionality that warfighters have come to trust in the ThermoBak 3L but in a new design that optimizes the space on a users back and won't interfere with a duty belt. The 3L Mil Spec Crux reservoir delivers 25% more water per sip and the external fill allows quick access to the