The Ultralight / Watertight Series features proprietary DryFlex bags for the ultimate in ultralight, waterproof storage. Ideal 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 who needs an ultralight kit with enough supplies for 1-4 people on trips up to four days. An inner DryFlex waterproof liner and an outer silnylon bags with sealed-seams provide two layers of protection from the elements. This is an ideal kit for adventures who may be exposed to the elements.