The Ultimate Ultralight Medical Kit | The Ultralight/Watertight .3 contains the first aid essentials you need for solo day trips where portable, waterproof gear is a must. Ideal for hiking, kayaking, mountain biking, and climbing, this first aid kit includes supplies to clean and bandage wounds, treat muscle aches, dress blisters, and treat other common outdoor injuries, all housed in a watertight DryFlex bag.