Alpine style refers to mountaineering in a self-sufficient manner, thereby carrying all of one's food, shelter, equipment etc. as one climbs, as opposed to expedition style (or siege style) mountaineering which involves setting up a fixed line of stocked camps on the mountain which can be accessed at ones leisure. Many consider Alpine style to be the purest form of mountaineering, setting a standard to which all mountaineers should aspire. This style became well-known and popular with Reinhold Messner, when he climbed Mount Everest without oxygen equipment in 1978, together with Peter Habeler.