Many testimonials have been written about the comfort and effectiveness of socks made by WrightSock. One testimonial stated that running on concrete gave her "happy feet." Wrightsocks™ are manufactured by Wrightenberry Mills, Inc. WrightSock socks have the anti-blister system™. Their socks are made with double layers which help to eliminate moisture build up thereby making sure your feet stay dry and cool. The perfect walking sock is the WrightSock anti-blister double layer walking crew sock. They have the CoolMax/Micro Safe Inner Layer. Acrylic Outer Layer. Flat Knit, not Bulky. Inner layer is always smooth. WrightSock anti-blister double layer running lo-quarter sock is the sock that serious runners demand. Also available in quarter length as well. The WrightSock anti-blister double layer running xtra quarter sock provides extra cushioning for your feet as they are pounding the trails or pavement.