The towels are cotton, and cost just $5.95 each. Link: Vintage Vera Neumann dish towels at Crate & Barrel.
But also read on — New Old Stock vintage linen dish towels are also still widely available.
That said, other designs of NOS linen dish towels — unused, still with their original tags — are very widely available via ebay (affiliate link above), etsy and estate sales — at very reasonable prices (if you don’t get sucked into some kind of bidding war). It seems that many women collected these or received them as a gift… and then socked them away for a special occasion (?). I personally adore how linen wears, and find that it is just as absorbent as cotton. Some of the big names in vintage linen dish towels include Parisian Prints, Kay Dee, Bucilla, Vera, and Tammis Keefe. Note, Tammis Keefe is as collectible as Vera; Tammis designs also will be spendy. Read one of my main stories about Tammis Keefe here.