Thule Aptitude 15" Computer Backpack. The Thule Aptitude 15” Computer Backpack was designed to fit your everyday need. This backpack protects a 15” MacBook/15.6” PC in the padded laptop sleeve with SafeEdge construction and can store a 10.1” tablet in a separate protective sleeve. Keep small accessories in the front zippered pocket with interior mesh pockets. Two side pockets provide easy access to a water bottle or electronics. This backpack is easy to grab and go with the padded backpannel and easy to grab webbing handle. Free run charges for embroidery up to 7500 stitches.