It is even possible to be less than the “Low End Weight”, which is what you should be striving to make.
Clothing low-6.5 high-9.5 Personal Gear low-9.9 high-17.5 Tent Mate Gear low-3.1 high-4.1 Troop Gear (12 hikers) low-3.1 high-3.1 Optional Items low-0 high-6.0 Total Pack Weight low-22.6 pounds high-40.2 pounds (this is crazy high!
Down bags are not good because they are ineffective when wet.
Arbitrary numbers (like 30% of his body weight) are interesting starting points for discussion, but the real determination is how much he can carry on the practice hikes.
Description of pack list items Personal Gear: Backpack: There are two main types of backpacks: the external frame and the internal frame.
(Some ultra light people do not bring any clothes except what they wear.) Each Buddy Team: Two-man tent (count the stakes) and ground cloth (optional) Group Equipment – Distributed among hikers Water filters – Water jugs/bottles/bags Stove and fuel bottles Large and/or medium cooking pots Cook Kit: spatula, serving spoon and/or utensils, measuring cup, camp suds and sponge, bleach, scrubber, Purell Stuff sacks for food Bear bags and rope (50 ft ¼” braided nylon rope, 50 ft 1/8” parachute cord, 2 ft 1/8” nylon cord) or Bear Canisters in some areas Repair Kit (sewing kit, small piece of cloth, safety pins, wire, pliers or Leatherman, superglue, tube, O rings for filter, rope, and more) Troop First Aid Kit (check it every hike) Permits, Maps, Medical Forms Pack List Weights in pounds No one should be carrying the “High Weight”.
It is listed so you can see how much you can save if you are careful.
Personal First Aid Kit: The Troop gear includes a fully stocked first aid kit, but you should also carry a personal first aid kit to handle minor problems.