Silky Los Boxers made from 55% Hemp 45% Tencel. Tencel (=lyocel) is considered a “green fiber”, so we feel comfortable using it. Note that we will not use bamboo due to the noxious manufacturing process. The chemicals used in the bamboo manufacturing process are simply not good for your skin. Very similar to the Rayon manufacturing process. In short, America’s developed a love affair with bamboo, but I say that America’s been “bamboozled”! You’ll want to see an article in Wikipedia about lyocel. (Note that Tencel is a trademark owned by Lensing Fibers of Germany.