There is now no need to separately pin out your fabric and interlining, as this product can be used as if it were a normal lining. This is a bonded lining and interlining product, that takes a lightweight interlining, and bonds it to a poly cotton sateen lining. It gives the look and feel of interlined curtains without all the extra time and trouble. This really is an excellent product, at a very competitive price. Dry Clean Only.