Naturally breathable pure 100% cotton 233 thread count cover. Filled with anti-allergy hollowfibres to maintain a fresh feeling. This all year round duvet keeps you warm and snug for a superior nights sleep. 100% cotton. Wonderful at wicking moisture away from the body, only the purest, natural cotton is used in our bedding. Anti-allergy Allergy triggering dust mites and bacteria are kept from building up as you sleep thanks to the anti-allergy hollowfibres. 233 thread count The high thread count is designed to keep dust mites at bay and maintain the filling firmly in place for a restful nights sleep.