1.Zipper closure.2.good construction and lightweight, versatile, strong and sturdy.3.With a long crossbody adjustable strap,smooth zipper.Roomy compartment to organize your cellphone, tablet, wallet, keys, ID card, credit card.4.Great convenience for charging your electronic devices via connecting your own power bank , you can easily and conveniently charge your phone, tablet and other devices without opening up the backpack.5.The casual backpacks can be used both as chest pack and shoulder bag, messenger bag, travel bag.Hiking, camping, climbing, running, cycling, amusement park and daily use, Commuting Picnic,Business, Outdoors Activities, Vacation, etc