Boreas Buttermilk 40 Backpack with roll-top. The perfect pack for the uncomplicated hiker who just wants to hit the trail and go. Designed specifically for those who want to move quickly and think carrying all that heavy stuff is just ridiculous. The Boreas Buttermilk 40 Backpack holds up to 56L of gear and is constructed with a 140D ripstop nylon body that has been coated with silicone to keep things dry, and a 420D nylon bottom end for durability. This simple backpack has a Z-foam back panel to keep you cool and a removable frame sheet both are shaped to fit the curve of your back. The foam belt keeps things comfy when under load. Lightly used. Minor scuffs from putting pack on the ground after a hike. Great for travel as well!