Package internal structure: ID bag, mobile phone bag, laminated zipper bag, zipper pocket, computer pocket 
 Function: waterproof, breathable, wear-resistant, lightening, shockproof 
 Features: 
 1. The outer compartment surface strip texture prevents frictional pilling. 
 2. Built-in thickened pearl cotton, stable back weight, breathable. 
 3. The bottom is lined with lining, which is firm and firm.