These are simply the cutest 2 tone knit slipper socks. Nice and stretchy. These are made of a double thick knit.dual layer of high quality knit at the ankle line. Great for gift-giving.celebrate christmas in style with these comfortable christmas socks. They are handmade with complex process, equipped with anti-skid particles abs environmental protection, increased friction with the floor. Fits shoe sizes 6-9.one size for teens and ladies. Due to the requirements of environmental protection non-toxic,after friction with the floor ,sole abs skidproof rubber may fall or gathering together sticking on the wool,but it will not affect the antiskid function.