The cover on this duvet is made from a soft microfibre with 100 hollow fibre filling, whereas low quality and cheap duvets have a polypropylene cover. ANTI-ALLERGENIC As hollowfibre is a synthetic fibre, it is suitable for dust and feather allergy sufferers and those with asthma and eczema. Excellent quality 4.5 tog hollowfibre filled summer quilt. EASY CARE As this duvet is machine washable at relatively high temperatures which dust mites and bacteria are unable to survive, leaving you with clean, durable and fresh bedding. SUMMER BEDDING This 4.5 tog duvet is perfect for use as a summer duvet due to the thin layer of hollowfibre, keeping you cool and making sure you don't overheat in summer. Light and lofty, this quilt is covered with a soft microfibre cover. Naturally non-allergenic , this quilt will give you a comfortable and cool sleep.