These socks use combed cotton yarn, which is a very soft version of regular cotton. Combed cotton doesn't have any impurities or short protruding threads, is stronger than regular cotton, and is made by treating the cotton fibers before they are spun into yarn.
I purchased the socks for my grandson He loves CHUP socks. I totally get why the appeal; the patterns and colors are unique, special, and colorful. I wish the "steel blue" looked more bluish than greenish blue. I know he will like them anyway when he receives the gift in person.