Macpac thought of through-hikers and fastpackers when they created the Amp Light 35 Pack. Using ultralight Titan Grid fabric and a minimal-but-still-supportive suspension system, Macpac managed to shave this backpacks weight to a mere 2.5lbs. Three large mesh pockets provide places to stash your shell, snacks, and other necessities, so you dont have to dig through the whole bag when you need another layer. Of course, the Amp Light 35 Pack includes a hydration pouch to keep water readily available. Stopping to drink just takes way too much time.