STM Summary Carrying Case (Sleeve) for 38.1 cm (15") Notebook - Dark Navy - Dirt Resistant Exterior, Moisture Resistant Exterior, Water Resistant Exterior, Knock Resistant Interior, Bump Resistant Interior - Polyurethane, Polyester Body - 269.2 mm Height x 381 mm Width x 20.3 mm Depth Take the best elements of our bags-a padded interior that protects from knocks and bumps, surrounded by a water resistant exterior-and fashion them into a piece only for your laptop. We call it stylish protection. You'll call it just what you needed.