Our Samsonite Wheeled Computer Backpack 19 inch 17878 features: • Laptop bag compartment: Accommodates up to 15.4" • 400D Rip Stop Nylon • In-line skate wheels • Contoured straps with extra padding for comfort • Padded back panel • Padded laptop compartment • Organizational pockets for today's latest technology • Internal organization • Water bottle holder • 3 Year Warranty. 400 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. • Weight: 5.0 lbs. Body Dimensions: 19.0" x 14.0" x 8.0" Overall Dimensions: 20.0" x 14.0" x 9.0"