1.Fabric type Leather 2.Closure type Hook and Loop 3.LARGE CAPACITY - The men laptop briefcase includes external two pouches & two pen slots and inside several slots in front large pocket with adhesive hook and loop tape under flap over, storage penholders, documents, binder, power cords, mouse, two main zipper Pocket with foam padded sleeve fits most 15. 6 Inch laptop, back invisible zipper pocket for your valuables 4.STURDY AND WATERPROOF - Made of high quality water-resistant PU leather fabric to provide maximum strength, durability, and longevity. Excellent keeping inside items dry against from splashing,even on rainy day 5.DIMENSIONS - The size of this spacious satchel is15'(L)x12'(H)x3.9'(W);which it is roomy for laptop,books,clothes. padded laptop compartment:39(L)x23.5(H)x4(W)cm(fits 15.6 inch laptop).and Weight:2LB/0.8kg,Adjustable strap :32.28'-54.1'/82-138cm.You can carry it as a shoulder bag,crossbody bag with adjustable shoulder strap 6.FREE YOUR HANDS - A luggage strap can attach the briefcase to the rolling luggage securely. Its humanized design makes it can be used work, holiday, outdoor activities, occasional travel etc