Samsonite BUR Backpack 600x600D Polyester - Is a man-made fiber produced by the polymerization of the product formed when an alcohol and organic acid react. Loosely defined, denier (D) refers to yarn size: the larger the denier, the bigger the yarn. Laptop compartment - Is a built-in padded compartment designed to carry your laptop computer and help protect it from shocks while traveling. Interior pocket - Is a separate compartment inside your suitcase that can be zippered shut for added security and organization. Padded shoulder strap - Are designed for comfort and ease of carrying. Non-slip shoulder pads attached to the strap disburse weight more evenly on your shoulder while you travel. A swivel clip at the end of the strap helps prevent twisting. Water Bottle holder - A side mesh compartment designed to hold your water bottle.