mountaineering with crampons on ski boots. ski tour on the fluela wisshorn in davos. steep summit ascent. swiss alps

active adventure alpine alpinist alps axe backpack blue boot challenge clambering climb climber climbing cold crampon crampons dangerous davos equipment expedition exploration extreme fluela footwear high hiking ice landscape mountain mountaineer mountaineering mountains nature outdoor safety shoe snow spikes sport steep summit switzerland travel trek trekking winter wisshorn woman