Thule Construct 28L Overview Thule Construct 28L Protect up to a 15.6" laptop and a 10.5" tablet in the dedicated, padded compartment of this Thule 28L Construct Backpack. The main compartment has organization features, such as a file pocket and multiple storage pockets for accessories. You can keep a phone or glasses in the soft-lined protective pocket. Secure smaller loads using the compression straps or attach additional items to the exterior lash points. Securely attach the backpack to rolling luggage with the pass-through strap. Use of them does not imply any affiliation with or endorsement by them.