Vtg Proban FR 7A by Westex Blue Jean Cotton Welders Pants 30 X 27 The product is a pair of vintage Proban FR 7A by Westex blue jean cotton welders pants in size 30 X 27. These unisex pants are designed for the welding industry, featuring a button front style and made of 100% cotton material. Manufactured in the United States, these durable pants provide both style and safety for those working in construction and welding occupations.