It's Human Hair...

Tatiana (with Aidric), looking at an abhorrent sight: Over two tons of human hair.

The sign in front of her reads:

"The Hair of Women murdered in gas chambers -- weight is approximately 1,950 kilos (4,300 pounds). Hair of victims was sold by the SS as a raw material for the German textile industry, and it cost 50 Pfennigs for 1 kilo.

Traces of hydrogen cyanide, the basic poisonous component of preparations called cyclons, have been found in the examined hair."