Very soft bamboo.
"I have been wearing bamboo socks for many years, as I love the softness. The brand I originally wore seemed to go out of business, so I had to search for a new bamboo sock maker. I found this brand, and ordered multiple pairs. I have been happy with them! The bamboo is thicker, so I think it's suited well for cooler temps. The designs are good and the softness is on point."
