When you're on the mountain, the last thing you want is to be looking for the one piece of gear that fell to the bottom—especially when you're wearing gloves. The SnoBlast's tri-zip design lets you choose between opening the top of the pack, or unzipping it down the side to instantly access all of your gear. When you really want to load up, the external attachment points let you carry a helmet and snowshoes on the outside of the pack. In addition to our 2L Crux® reservoir, the Therminator™ harness also keeps your insulated drinking tube zipped securely into the shoulder strap, which keeps it from freezing in cold weather so you stay hydrated on even the coldest peaks.