Bagland Camping Hiking Travel Sport Backpacks Composite MATERIALS: Attractive fabric and water-resistant, quality zippers, careful stitching, and well though out storage compartments, weight lighter but durable. PACKAGE: Large single compartment; One main bag; Four outside pouches; Dual side pouches for umbrella, water bottle. AdjustableShoulderStrap from 18" ~ 36", Strap width: 3".The shoulder straps are well positioned, air mesh on the shoulder straps provides comfort and breathability, easily adjustable. There are also D rings on the outside of each strap, which is a nice touch, plus a carry handle at the top. DIMENSIONS(L*W*H): 13" x 7" x 18". Multi-pouches design is pretty convenient to compact a lot. Comfortably holds an 14" laptop, mobile phone and iPad, earphones, passport, social security card, credit cards, wallet, pencil case, B4 size books, umbrellas,drinkingflasks, sunglasses,cigarette,tissueandotherstuffs. OCCASIONS: Great backpack for school, traveling, sports, traveling, climbing and very comfortable! BEST GUARANTEE: If, for whatever reason, you don't absolutely love your bag, just return it, and we'll refund every penny (or replace It, if there is a problem).