BAG SIZE : 66*30*24CM Polyester&Nylon Comfortable Daypack: This climbing backpack is specially designed for traveling enthusiasts, ergonomic padded shoulder straps and back support,gives you more comfortable feeling.Breathable mesh shoulder straps with plentiful sponge padding help relieve the stress from your shoulder. Widened and thickened S-type shoulder straps and high elastic breathable back support for best ventilation and easing burden.And this pack doesn't have an internal or external frame. LARGE CAPACITY & MULTI COMPARTMENTS:Spacious main compartment and numerous pouches with large capacity.Special main pocket closing drawstring design, tight closure to prevent the items falling from the backpack.With one Interior Pouch for water bladder.Shoes separated storing pouch, preventing the items inside backpack to be dirty, convenient and practical.Two side pockets to carry more water bottles, And it meets size requirements for most airlines, enough room for 3 or 4 days trips. With 8 ADJUSTABLE STRAPS:for tying up your pack or hanging sleeping bag, mat, hammock, tripod, and other gears,convenient for the hiking, climbing, camping enthusiasts. Water-resistant:Made of high-quality and safe material, it is durable for long-time use.nylon fabric material, Made of High quality rip-stop polyester material, water resistant, tear resistant.and included extra rain cover pouch on the bottom pouch,prevent the water and dust into the backpack,protect your valuables from heavy rain and keep everything dry.