635 Denier Polyester / Synthetic Leather. COOL STUDENT DETAILS - This backpack will help keep you organized when on the go with two spacious main compartments, a padded 15" laptop sleeve, a side water bottle pocket, and three front zip pockets. ICONIC BACKPACKS - The Cool Student has our signature leather bottom and is made to carry in comfort with the ergonomically constructed S-curve shoulder straps, padded back panel, and a quick grab web haul handle. RELIABLE BACKPACK - The Cool Student durable construction is made to last; This daypack comes in a variety of colors to reflect your style; A versatile bag that's ideal for men, women, teens, or college students.