HIGH-QUALITY MATERIALS - Our Clima-Wool construction features a resilient merino wool, nylon, and spandex combination, perfect for outdoor activities in both warm and cold environments; This fabric is designed to deliver top-notch performance and coziness regardless of season; Perfect for hiking and winter wear anywhere, it will become one of your favorites BREATHABLE & MOISTURE-WICKING - Clima-Wool fabrics boast incredible breathability and temperature control for a comfy fit in any environment; Our Men's Merino Zip-T Base Layer Top is fast-drying and sweat-wicking, allowing you to remain dry and energized no matter the activity FUNCTIONAL DESIGN - The wool-blend base layer from Hot Chillys features four-way stretch for unlimited movement and a relaxed fit for casual or performance wear; It is designed with hidden thumbhole loops for additional comfort; This Clima-Wool Merino Zip-T also gives you a touch of UPF 30+ protection to shield your skin from the sun's rays WIDE RANGE OF USES - This active half-zip top for men is a crossover between performance and lifestyle, making it great for a day on the slopes or a morning walk with your dog; Providing you ultimate comfort and mobility it is perfect for various occasions, and it is the perfect layer for casual wear and outdoor sports WASHING INSTRUCTIONS - Machine wash separately on cold with like colors; Tumble dry low; Do not use bleach or fabric softeners; Do not iron; Wash before wearing; Wash between uses; This Hot Chillys men's winter sports base layer is easy to care of, making it a handy companion for everyday wear HOT CHILLYS Mens Merino Zip-T, Color: Black/Grey, Size: L (HC1115-107-L)