The Thule EnRoute Escort backpack is the largest in the Thule arsenal with an internal volume of 29 liters. The bag is divided into three main compartments, allowing for separation of the commuting essentials. The compartment closest to the back is designed to carry a 17″ MacBook Pro and an iPad. Both compartments are well padded and keep the devices safe. The central compartment is the catch all of the bunch, and is the best place for an extra jacket, shoes, and other miscellaneous items. The third compartment is meant for pens, business cards, keys, and other smaller items. There is an additional “Safezone” compartment for an iPhone and glasses. This is a crumple free zone that cannot be smashed, as it is hard construction. Despite its many pockets and features, the overall look of the bag is simple. The bag is black with fluorescent yellow highlighting that is both highly visible, and also serves as an attachement point for a blinking light. The bag has been in my commuting rotation for many months, and no matter what essentials I throw in, the bag handles it all very well. A laptop, iPad, boots, U-lock, and other items are carried without issue, and the design of the compartments evenly distributes the weight, making it a breeze to have it all on your back. I try and avoid carrying many items, but when the occasion arises, this is the bag of choice. Thule has done well with their entire line of luggage, and having now used several pieces, I think the quality and price point are tops in this incredibly competitive segment. The Thule EnRoute backpack lists for $119.95, and is available directly from Thule, or locally at many fine retailers.