In The Man from U.N.C.L.E. televison series, David McCallum played a spy, Illya Kuryakin...

According to this site, "Illya's black turtleneck and hairstyle became fashion icons as seen in the extensive coverage by magazines like GLAMOUR.
Clairol hair products, not be left in the dust, repackaged their hair straightener as Clairol's U.N.C.U.R.L." ...

U.N.C.U.R.L.:
Unbeatable
New
Conditioner &
Uncurler for
Relaxing
Locks