A flexible layering system is key for fast-moving mountain ascents and fast-changing conditions. The Ascendor Light long sleeve half zip is a low-bulk and adaptable midlayer, keeping you warm when you need it and wicking sweat quickly. Stretchy and slim fitting, it drops low over the back of your hips and fits comfortably under layers or a harness. Ideal for year-round climbing, alpinism, and mountaineering, or for any activity where free movement is the highest priority, it provides you with that extra layer of warmth in high winds or changing temperatures.