The Ultralight / Watertight Series include 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 / Watertight .7 is designed for adventure racers, multi-sport enthusiasts, and anyone looking for an ultralight kit with enough supplies for 1-4 people on trips up to four days. Inner waterproof liners and seam-sealed outer silnylon bags provide multiple layers of protection from the elements. This is the kit for adventures where exposure to the elements will be an issue.