Mission Workshop just announced their new limited edition X-Pac Ramblers:
“The X-Pac Ramblers are made with a 420d nylon outer layer laminated to a PTFE membrane, resulting in an exceptionally durable and waterproof barrier to the elements. In all other ways they are identical to the regular production Rambler which feature a weatherproof main compartment which can be used in either “roll-top” mode, or in a traditional “flap-down” configuration.
A key feature of the Rambler backpack is it’s ability to quickly double in size from 1,350 cu.in. to 2,700 cu.in. when needed for extra cargo carrying capacity. For more details on this pack, visit the Rambler page.
Made in the USA with a lifetime warranty.”