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. 3-4 Days Travelling : Our backpack fit women and men in 5'-6'5" (90lb-250lbs) and It meet size requirements for most airlines, enough room for 3 or 4 days trips. 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. Lightweight backpack for outdoor, Ultralight, only 2.1 pounds for 60L large capacity,reducing the backpack loading weight so that you can carry more other items.