Briefcases are box-shaped bags that have handles (may have on one side or two) and may have shoulder straps. Briefcases are most often known for their use by professionals to carry important documents. Briefcases may also be designed to carry laptop computers.
About Nylon:
Nylon is a synthetic fiber used for many different applications. It is strong, elastic, quick-drying, and resistant to abrasion which makes Nylon especially useful in the manufacturing of footwear and luggage.