A Wool Blanket is a very good survival item with many uses.
Sleeping aid
Lie on/under for comfort and warmth.
Use as a makeshift sleeping bag.
Clothing
Can be used as a cloak or poncho.
Scratch and bite resistant.
Storage
Can be used as a bag.
Shelter
Can be use to create a 'lean-to'.
**Naturally water proof and fire retardant**
With the new weather and clothes on the way etc. it would be very nice to use a blanket to-
Put on a bed for warmth while sleeping.
Wear as a cloak for warmth and protection from the rain.
Use as a bag
It would also possibly be cool to use as a sleeping bag or shelter but that might be a bit too much?
Down sides to wool
Heavy (especially when wet)
Itchy
When worn like a cloak you will be laughed at because you want to be a medieval warrior...