Premium Wool Mattress Protectors by Accessorize feature:

Cover - Cotton. 
Reverse - Polyurethane (waterproof backing)
Fill - Wool. 
Skirt - Polyester/Cotton.
150GSM

Natural cotton sateen cover.
Filled with Australian Superwash wool certified by Woolmark.
Treated with Purafresh to ensure effective protection for asthma and allergy sufferers.
Waterproof backing helps protect and prolong the life of your mattress.
Suitable for all year round use.
Fitted skirt stretches to 45cm to suit most mattresses.