FR Oil Field 7 oz. UltraSoft Red Coveralls With Reflective MX1188US7. Flame Resistant Coveralls from with reflective Big Bill are made with Westex Red Ultrasoft 7 oz. material for flame resistant protection made with 88% cotton and 12% high tenacity fabric. 3M fire resistant reflective 2" tape vertical over shoulder, 1 horizontal on arms and legs.