These socks have become our favourites. They are as close as you can get to 100% wool and still retaining wear resistance. The 90% wool part of the blend is pure British wool and the 10% nylon makes them last a long time. I would put the weight of these down as medium weight making them perfect for everyday wear with boots. Available in two sizes: Medium: to fit UK 7-9 Large: to fit UK 9-11.