From day hikes to extended treks and high-mountain adventures, a backpack is relied on to keep your gear safe and organized while offering high levels of comfort. Below are our in-depth pack reviews, including high-capacity designs for backpacking, lightweight bags for hiking and travel, and streamlined models for climbing and the alpine. To provide the best information possible, our team has done extensive research, tested the products in areas ranging from Patagonia and New Zealand to the Pacific Northwest, and included key comparisons to relevant competitors.