This product is ineligible for discount codes. External Dimensions: 18'' x 12.5'' x 9.25''. Internal Volume: 1,900 cu.in. (31 Liters). Laptop Sleeve holds up to a 15 in. laptop. Weatherproof Construction. YKK weatherproof urethane zippers. Hide-away grab handles. Removable-quick adjust shoulder strap. Optional backpack harness that can be ordered separately from MW. YKK snap attachments for front porteur style bicycle rack. Proudly made in the USA.