Samsonite&reg; Pro-DLX Laptop Messenger Bag, BLACK 2520 Denier Nylon - Nylon is a high strength, durable material with excellent wear properties. The term " denier" (D) refers to the size of the yarn used: the larger the denier the bigger the yarn. Gel-infused Shoulder Pad - Soft gel-infused shoulder pad makes carrying more comfortable. 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.