The ingenious invention of mankind :) special socks that must be worn at night, pre-smeared foot creams, oils and all that than you are used to care for their feet. Firstly, socks cream / oil does not absorb - and, consequently, all the nutrients funds remain on their feet and work with the legs, not with linens. Secondly, that stems from the claim 1, bed linen is not spoiled =) Third, socks - multiple use, that is good =) functional product that fully justifies its price. Wash by hand - viscose still (in the machine is also possible, but I dare not - I'm afraid that stretch). My leg 23 cm, size 36 - is not the biggest, frankly, but socks are sitting tight and almost do not slip from the feet. And, finally, bamboo viscose is considered a modern eco-friendly material, so that the feet of a double benefit and pleasure =) bought in store another couple, I use it with pleasure.