This is a very convenient bag, use water resistant canvas material, wear resistant, let the bag companion with you for a long time. The bag with very large capacity, have two sizes options, one fit up to 15.6 inch laptop, another one fit up to 17.3 inch laptop, the foam laptop layper could protect the laptop very well. The interior two small pockets to keep pen, mobile phone, key etc. And 2*side p...