The Micro Shirt is a terrific winter top. A high polo-type collar with a light weight zip allows you to control upper body temperature when things start to get steamy. We’ve cut the back extra long, so it won’t ride up under your pack. A thumb loop on the sleeve helps keep hands warm on those extra frosty mornings. Made in New Zealand from the finest quality 140gsm micro-fleece. Ultra-soft and lightweight yet undeniably durable. Allows moisture to wick away from your body. Keeps your core at a constant temperature even when wet. Cut extra long to keep vitals protected and warm, and to prevent the top riding up during movement. Chest zip for instant temperature control and ventilation. Thumb loops to keep hands toasty and sleeves where they should be. Packs down exceptionally small and can be used as a pillow if needed!