The Pulse (Previously known as The Atom+) Trails are changeable. If you go on a long thru hike then your gear, clothing, food and water requirements will all change as the trail goes on. The Pulse is the answer – an ultralight pack that can adapt with you to meet the conditions. Built on the same body as the Atom, The Pulse gives you the same easy access to everything you need to keep hiking all day long using the five accessible pockets when worn. We increase the torso length a little to accommodate a removable hip belt, the back panel has a removable carbon hooped frame and foam sleeve inserted from the inside. When all of this is stripped from the pack, the bag is 160g lighter and ready for an even more ultralight adventure. Load capacity13.5kg / 30lbs Weight675g / 23.8 oz (medium, medium hipbelt) Height fully unrolled84cm / 33" Circumference at base84cm / 33" Circumference at top94cm / 37" Main body volume45L Side pockets volume2 x 2.5L