To wear indoors or outdoors when it is not so cold, these are knit with 75% kid mohair loops for cushioning with a finer yarn than the regular socks. If you find the regular socks too thick for your shoes, these are the socks for you, but keep in mind that they will not be as warm as the regular socks.
Although, the loops inside the socks are made with 75% kid mohair and 25% nylon, nylon is added to the outside of the socks to allow stretch and elasticity. This reduces the kid mohair content throughout the whole sock, but the loops you feel inside are still a 75% kid mohair / 25% nylon blend.
When including the outer layer of nylon, the total sport sock content is 61% kid mohair and 39% nylon.