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 Adventure Medical Kits Ultralight and Watertight .3 First Aid Kit 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.