The Mountain Smith Zerk 40L Backpack is designed for minimalist thru-hikers and lightning-quick overnighters, perfectly blending lightweight performance and diamond-tough durability. The 40-liter bag weighs less than two pounds, setting us up for ultralight adventures deep into the wild. The harness-style shoulder straps keep the pack close to our body and have four easily accessible pockets to stash our phones and snacks. The front bungee cord allows us to attach bulky gear to our pack, and nine total pockets keep quick-access items nearby, so we never waste a minute of daylight searching through our pack.