The Ultralight/Watertight Series has been redesigned for 2010 and now features proprietary DryFlex bags for the ultimate in ultralight, waterproof storage. For the multi-sport athlete that refuses to be let down or weighed down by his or her gear. The Ultralight .3 is for any adventure where weight is a primary concern. This kit has enough supplies to treat minor to moderate injuries during a day hike or short overnight, all packed in a DryFlex waterproof bag. The contents list is printed directly on the bag, so there's no packaging to lose and no extra material to weigh you down.