All of the VKK suits should be worn with special VKK socks. These do not come as part of the VKK suit, but are issued separately - this is also the reason why they are much harder to find then suits.   Pair of socks that are issued with VKK-6 suits. Near the top both socks has small stamps - first comes Russian letter "L" (left) or "R" (right), followed by the size (in this case size is 39-40). Socks are made out of none elastic material so to make them fit better to feet, one needs to adjust laces.