Burton ak 31L Backpack: There comes a time when “just over the next ridge” isn’t quite far enough, when a little deeper isn’t quite deep enough. When it’s time to start exploring the back of the backcountry the Burton ak 31L Backpack is there. Surprisingly light weight and armed with multiple board carrying options, a cavernous main compartment, and easy-access avalanche safety gear stashes, it defines guide-grade backcountry performance. Proven and developed in some of snowboarding’s most inhospitable environments by professional mountain guides and team riders like Jeremy Jones, Jussi Oksanen, and Frederik Kalbermatten, this pack conquers when other packs crumble.