Writing a recession over socks maybe is more for a textile engineer. My amateur expertise falls nothing more than: there are socks. Adjust. You sit comfortably. The rubber frets left no footprints on the shackles. The quality I find adequate for my needs. Of course they are eventually washed out sometimes, but I have 50 pairs of socks, because each pair is washed in a maximum of 7 times. Even if they are after 28 washes "by", hold four years.