This top quality portfolio sports original Martexin waxed canvas, the most durable waxed canvas on the market. It features a large inner compartment with protected laptop sleeve with a buckled flap closure, as well as two large front pockets and front and back pouches. For more space, the bag features a middle zipper that, when opened, almost doubles the bag's width. The Builford Haversack also features a padded, adjustable, and removable shoulder strap for ease of carrying.