The backpack use top quality water resistant nylon material, wear resistant, no need to worry small scratch while travelling. 30L capacity, with laptop layer, 1*main compartment, 2*side pockets, 1*back pocket, 1*front zipper pocket and interior pockets. Enough roomy to put clothes, sun glasses, laptop, mobiles, water bottle etc. The key chain design allow to find the key more easily and avoid to loose the key. We do reinforcement on the shoulder strap, and the excellent workmanship make the bag have powerful load bearing capacity. Breathable back cushion and arcuate shoulder strap, provide more comfortable experience on shoulder and back.