Wool blankets, natural, undyed colors.?

I can't tell if you mean they are selling sheepskin, or woven blankets. Woven wool blankets are really nice and warm, shouldn't be itchy since you'll have a bedsheet between you and the blanket. If it feels soft to your hand, it will be soft to sleep under anyway. They can last many years with proper care. I have some wool blankets at least 50 years old. They can usually be washed, by hand(hard work) or in a delicate cycle in cold water if the blanket will fit in the washer easily(front loaders are good for this), using a detergent meant for wool, but ask the sellers how they recommend washing. If you put it in a dryer, use a cool or air cycle, or dry it sort of halfway on warm and then air dry. Heat is not good for wool and can cause shrinkage which is irreversible. Drycleaning is an option, and is best done once or twice a year only, unless the dog throws up on it or something like that, and definitely before you store it for summer. Storing wool without cleaning it is an invitation to moths. If you can store it airtight or at least with no openings that moths can get through, that's best, plastic bags are okay but a cloth one would be better.