Carhartt Utility 23L Laptop Backpack. This work pack, with its Duravax-base, is tough enough for the jobsite and spacious enough for a weekend trip 1200-denier polyester with Rain Defender durable water repellent and Duravax abrasion resistant base Pack features large main compartment with dedicated 15-inch laptop sleeve and tablet sleeve and two exterior mesh side pockets Front zippered organization compartment and fleece lined eyewear compartment Padded air mesh back panel and contour fit shoulder straps. Backpack Dimensions: 11.5” X 18” X 8” Volume: 23L