The Santini Alpha Pack vest is a revolutionary product. The outer layer of lightweight windproof fabric is enriched on the inside with Polartec® Alpha®, a Merino wool-based fabric that adds warmth without adding weight to the jacket. Polartec® Alpha® regulates your body temperature and provides excellent breathability in rapidly changing conditions. The large zippered front pocket covers all your personal essentials and when it's free, you can fold the vest into it. A long side zipper serves for extra wind protection. Reflective details on the back increase your visibility. - Recommended temperatures from +5°C to +15°C - Lightweight windproof outer fabric - Merino wool-based Polartec® Alpha® - Warmly bonded zippered chest pocket for vest storage - Double slip front zipper - Triple mesh back pockets - Reflective details on back for high visibility