The Kluane starts with a fleece lining to keep you warm on those cold, early morning starts or as you transition at the top of a line. We picked a mid-weight fleece to balance warmth without overheating on the skin track. The Kluane’s earflaps lock in the warmth, keeping you toasty on the coldest midwinter days when the snow is so light and fluffy that sitting by the fire just isn’t enough. If things heat up, simply flip the flaps up for the same breathable airflow as our other models.