Whether you're heading to the Wind River Range for a week or simply hopping off the bus in Denali National Park for a couple nights in the wilderness, the Mystery Ranch Glacier 71L Backpack gets the job done. This durable pack offers ample space for multi-day missions, and its classic style is right at home on any trail. The Glacier features the new lightweight Astral Frame, which draws on Mystery Ranch's expertise in designing packs for the military, keeping your fully-loaded pack supported and stable when you're tackling daunting terrain. The adjustable yoke helps you dial in a custom fit, and features plenty of breathable mesh padding to keep you comfortable on the trail. A top-loading design with a side zipper helps you pack efficiently and allows you to access gear without disorganizing everything. Don't worry about chilly nights because the Speedzip compartment accommodates the warmest, bulkiest sleeping bags. Plus, the lid detaches for use as a day pack on quick trips from basecamp--the back yoke can be detached from the main pack and transferred to the daypack for comfortable carry.