Originally Posted by jaciqltznok
Here is my #1 tip on buying shirts, if it has NO label, so not buy it, no matter how good you are at knowing fabric, feeling it alone is no guarantee that it is cotton.
There is one way of testing fabric that isn't labeled. If you can pull several threads from a seam or clip a tiny piece of fabric you can set it on fire with a match. Pure cotton will burn to ash leaving nothing behind. So will silk and wool. Any synthetic will leave a small ball of residue. I have found several large (5 yards or more) pieces of fabric in thrift stores. I always check it this way if it isn't marked.