The Nirvana 35 is a fantastic winter pack. It is large enough for long day trips in the mountains, and has all the features you need for safe backcountry travel. Including: a front compartment designed specifically for easy access to your probe and shovel, diagonal and lateral ski carrying system, an external helmet holder, insulated hydration tube cover in shoulder strap , ice axe and/or trekking pole straps and zippered back panel for easy access to gear in the main compartment. There is sufficient storage space for lunch, extra gloves and clothes, headlamp and a first-aid kit.