Denim backpack with 4 Seasons embroidery (Medium)The big "4 Seasons" backpack in durable denim with our 4 season Tree of Life embroidery has always been a big hit. We also do them in a "33" medium size (18. 5"x11. 5") version. Same heavy weight denim, in Olive or Caf, with front pocket, inside organizer, our famous concealed pocket, and the same 9 color "4 Seasons" embroidery. 15 oz. heavyweight denim, durable inner liners and ergonomic molded straps.