KAKA Travel Laptop Backpack17-Inch Computer Waterproof Daypack, Outdoor Travel Anti-Theft Backpack, Hiking Camping Backpack for Men Main Material: This backpack is made of durable terylene oxford fabric, and the lining is resisted Approx Dimensions: 12" L x 22" H x 7"W Capacity: 35L Dimension:11.8x7.1x22.4inch(L x W x H) COMFORTABLE STRAP: Three-dimensional ventilation design on the back and the strap to promote air circulation, which is conducive to heat dissipation. It uses three special materials to achieve super decompression and shock resistance. The shoulder strap feels gentler than other bags whiling wearing. OUR SERVICE: If you are not satisfied within one month, you can get an unconditional refund. If you have quality problems within one year, you can contact us. We will respond to your request and after-sales guarantee within 24 hours.