Samsonite Solar Messenger Bag 450 Denier recycled PET fabric 12" high 17" wide 420 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. Laptop compartment - Is a built-in padded compartment designed to carry your laptop computer and help protect it from shocks while traveling.