Alpha Pro Tech, Ltd., together with its subsidiaries, develops, manufactures, and markets a range of disposable protective apparel, infection control, and building supply products in the United States and internationally. The company operates through two business segments, Building Supply and Disposable Protective Apparel. The Building Supply segment offers construction supply weatherization products, such as housewrap and housewrap accessories, including window and door flashing, and seam tape, synthetic roof underlayment, and self-adhered roof underlayment, as well as other woven material. The Disposable Protective Apparel segment provides shoe covers, bouffant caps, coveralls, frocks, lab coats, and gowns and hoods, as well as face masks and face shields. The company sells its products under the Alpha Pro Tech brand name, as well as under private labels. Its products are used primarily in cleanrooms; industrial safety manufacturing environments; and health care facilities, such as hospitals, laboratories, and dental offices, as well as residential and multi-family building and re-roofing sites. The company distributes its products through a network of purchasing groups, distributors, and independent sales representatives, as well as through its sales and marketing force. Alpha Pro Tech, Ltd. was founded in 1983 and is headquartered in Aurora, Canada.