yes... that is Palm Beach fabric. you can tell because it says so on the labels.
there is often confusion about what Palm Beach is made of and no wonder; there were several slightly differing 'blends'. for instance 1920s Palm Beach suit fabrics were 50/50 mohair / cotton.
however a 20s-30s Palm Beach tie label i have states the content is 50% rayon, 32% mohair, 13% cotton, 5% nylon !