"Collection of human hair from barber and beauty shopswas made compulsory in towns of 10,000 people or more."Much is made of the fact that the Germans use to collect hair of prisoners held in their concentration camps, particularly the large amounts of hair found at Auschwitz by the Soviets, which is claimed to have been cut off the victims of the gas chambers once they were dead.
There are dozens of original German documents that show that hair was collected in concentration camps, and the British decrypted German radio messages which discussed the collection of hair in camps and what it was use for, therefore knowledgeable revisionists do not wholly dispute the collection and use of human hair by the Nazis, merely some of the wilder, unevidenced claims about what it was used for.
In March 1944, a report titled "The Textile Industry in France" was compiled by staff of Liberated Areas Branch of the Foreign Economic Administration, a U.S. agency set up in September 1943 (and dissolved in late 1945) to deal with issues relating to foreign economic affairs which had previous been managed by many different agencies within the US government.
Interestingly the report mentions that the Germans had issued orders in the autumn of 1942 that all human hair was to be collected from barber shops and beauty saloons in French towns with a population of over 10,000 people. This order had been part of the "Third Kehrl Plan", an economic programme covering the period October 1942 - October 1943, devised by Hans Kehrl, the head of the planning office in the Reich Ministry of Economics. He was subsequently tried at the Nuremberg Ministries trial where he received a 15 year sentence.
It's worth noting that the cited Foreign Economic Administration report only concerns itself with France, so it makes no mention of what measures being employed in Germany regarding the collection of human hair from citizens or camp inmates. Although, the report does mention that a total of four "Kehrl Plans" were effected during the war, so anyone looking to learn about other hair collecting schemes could do worse to track down his plans to see if they contain instructions regarding this.