This is Russian Caps. All of them used by Russian Army and SF. You can find different caps in different colors here. Including souvenir production.
This is Russian Hats. Most of them created for cold and wet weather. Made from wool or fleece, they will keep your head warm.
This hats created for cold Russian Winter. They will works perfectly in outdoor, when temperature below 0 celsius. Some of this caps can be great souvenir.
Beret is a distinctive feature of Russian Units, like VDV or Military Police. Man in beret looks like a real superhero on battleground.