Maybe they are compression socks like these: [ame="http://www.amazon.com/Activa-CoolMax-Athletic-Support-Socks/dp/B0000ZSJA8/ref=cm_lmf_tit_12"]http://www.amazon.com/Activa-CoolMax-Athletic-Support-Socks/dp/B0000ZSJA8/ref=cm_lmf_tit_12[/ame]