Comfortable backpack: This mountaineering backpack is designed for travel enthusiasts, with ergonomically padded shoulder straps and back support to make you feel more comfortable. The breathable mesh shoulder straps are equipped with a large amount of sponge pads to help relieve shoulder pressure. The widened and thickened S-shaped shoulder straps and high elastic breathable back support provide optimal ventilation and reduce burden. In addition, this backpack has no internal or external frame.Design improvement: We have improved this backpack for colors such as military green, teal, navy blue, dark purple, etc., and added a separate shoe compartment at the bottom of the backpack, which can be used to store shoes to prevent the items in the backpack from being dirty, which is practical and convenient. Warm reminder: There is no shoe compartment design for backpack colors such as black, blue, green, purple, red, light blue, lake green, etc.Large capacity and multiple compartments: Large capacity, spacious main compartment and multiple pockets provide enough space for 3 or 4 days of travel. Zipper closure, tightly closed to prevent items from falling out of the backpack. Two side pockets can carry extra water bottles. Convenient and practical. Meets the size requirements of most airlines.Comes with 4 adjustable straps: for tying your backpack or hanging your sleeping bag, mat, hammock, tripod and other gears, suitable for hiking, mountaineering and camping enthusiasts.Waterproof: Nylon fabric material. Made of high-quality ripstop polyester material, waterproof and tear-resistant. Prevent water and dust from entering the backpack, protect your valuables from heavy rain, keep all your items dry.Lightweight outdoor backpack, weighs only 1.7 pounds, with a capacity of up to 50 liters. Maximum load-bearing capacity of 22 pounds, excellent storage system. Unfolded size: 64 x 32 x 19 cm / 25.2 x 12.6 x 7.5 inches.