The Ultralight / Watertight .5 is perfect for one-to-two-day solo trips when an ultralight kit with enough supplies to treat common injuries is needed. Packaged in a rugged, yet lightweight silnylon bag with a DryFlex™ waterproof liner, the UL / WT .5 will stay dry in all elements. The silnylon bag is watertight and roomy enough to add other first aid and survival items and provides rugged protection for the DryFlex™ liner.