An incredibly durable mountaineering dome-shaped shelter built to withstand the rigors of high-alpine environments, the Big Agnes Guard Station 4, 4-person and 4-season tent features an external pole design which means it can be set up with just the fly as a group shelter, or you can clip in the tent body for a more traditional zip-up camp tent. The DAC exoskeleton pole system is incredibly strong and offers generous living space.