Requisite ultralight backpacking group photo

Why ultralight backpacks? Devotees of ultralight backpacking know you reduce your packweight most by concentrating on the “big three;” backpack, shelter, and sleeping bag. Forget those 6-pound backpacks, 9-pound tents and 5-pound sleeping bags. Reduce that 20 pounds to less than 5, keep the other gear to 5 or 6