Workman X-Shelter Insulated β Long Sleeve Shirt M New Color: Black Size: M Product Features Insulated β features higher insulation and heat retention. Convenient pockets are placed on the sides and chest, and the collar can be buttoned up to create a stand-up neck. The rounded hem with a round cut makes it easy to wear as a single layer or as an outer layer, making it a versatile item that is useful during the changing seasons. Product Description A long-sleeved shirt that uses an insulating material that is not easily affected by external cold air. The newly developed insulation sheet uses aerogel material, and a special multi-layer structure that creates air layers makes it difficult for cold air to pass through. With both heat retention and insulation, it is active for a long season from the chilly early autumn to the cold of midwinter. The sheet itself has stretchability, making it easy to move in. Size...M