Travel light and fast with the Ultralight/Watertight .5, which weighs only 3.6 oz. With enough first aid supplies for a pair of adventurers heading out for 1-2 days, this 100% waterproof first aid kit lets you be prepared while keeping weight to a minimum. Designed for multi-sport athletes, the Ultralight/Watertight .5 is ideal for ultralight hiking, kayaking, skiing, and mountain biking.