We all know that removing weight from the back significantly enhances any cycling experience. So, with this in mind, Timbuk2 took comfort to the next level with its newly designed Hunchback Rack Trunk. Now, this isn't a run of the mill rear bag that's limited to non bulky items and permit mounting. Instead, the Hunchback is easy to attach and detach by means of two large hook and loop straps. Additionally, it has a removable shoulder strap for seamless transitions from two wheels to two feet. Not only that, the Hunchback's padded and insulated main compartment has a TPU thermoplastic polyurethane treatment. In layman's terms, this means that you're able to safely transport delicate items in inclement weather. So, when you're within the city's bustle, you'll be able to load up the Hunchback with brie, baguettes, and red wine for a sunset drenched, hillside picnic. Or, if you're of the, proletariat sect, the 13 x 5. 6 inch footprint and expandable roll top will happily hold a twelve'r of cans complete with ice. The TPU coating ensures that the interior is also easy to clean post happy hour. And for even more utility, the bag includes a U Lock pocket, multiple external stash pockets, and an aluminum bottle opener. Like all Timbuk2 products, the Hunchback Trunk Rack is covered by a lifetime guarantee. The Timbuk2 Hunchback Rack Trunk is available in the color Black and in one size.