The Peak Design Travel Backpack 45L is the one bag that covers every stage of a trip. It meets international carry-on size requirements while expanding to a full 45L for multi-day gear, or compressing down to 35L as a lean day bag. Four access points — top, side, front, and rear — all sealed with weatherproof UltraZips mean you can reach any item without unpacking the whole bag. The main cavity divides for organised packing, with a padded laptop sleeve, tablet sleeve, and mesh organisers built in. Tuck-away shoulder straps and an optional hip belt convert it from luggage to backpack in seconds. Made from 100% recycled 400D nylon, Fair Trade Certified, and carbon neutral.