My take on “bamboo” socks: buyer beware! The bamboo in these might start as a natural product but my understanding is that the cellulose in the bamboo is extracted in an industrial process and transformed into “Rayon” fiber. I tried these socks and found them worse than cotton. They “wick” moisture away from your feet all right. But then they trap that same moisture right next to your skin. These socks were terrible. They are not pricey but it doesn’t matter because they leave your feet soggy and cold.