This Mountain Warehouse thermal base layer set provides essential warmth and comfort for outdoor activities in cold conditions. Designed specifically for men, this two-piece set includes one long-sleeve top and one pair of leggings to provide a complete insulating foundation under outer clothing. The fabric is crafted from a blend of 70% merino wool and 30% polyester, combining the natural thermal regulation and moisture-wicking properties of wool with the durability and shape retention of synthetic fibers. Integrated Isotherm technology enhances heat retention, while the breathable, lightweight construction ensures comfort during active use. The material features anti-bacterial and odour control properties to help maintain freshness during extended wear. The bottoms feature an elasticated waistband for a secure and comfortable fit, and the set is finished in a versatile plain black design.