This item is a U.S. Military Extended Cold Weather Clothing System (ECWCS) brown polypropylene base layer set, commonly referred to as "Polypro" thermals.The set includes:The Top: A mid-weight, quarter-zip undershirt featuring a high collar and a deep zipper layout for ventilation.The Bottoms: Matching thermal drawers/pants featuring an elastic waistband and ribbed cuffs designed to keep out the cold.This heavyweight material is heavily prized for its moisture-wicking properties and inner fleece texture designed for warmth during extreme conditions. Size: Medium Stored in a pet and smoke free environment. Message me, with any questions or Offers. Thank you, for visiting the closet of the Crazy Vendor.