Lovely 'handwoven linen' look decorator fabric, very mid century modern! This I believe is on it's original bolt, but I haven't been able to find any other Cohama fabrics like this online, so I'm not certain.
The fiber content is listed as 100% orlon, and that seems likely to me. It's 45" or 46" wide, 5+ yards in a continuous length, all in excellent condition.