Synthetic Pillows: Up To 50% off the RRP's included! We know that there are some people out there who require man made fillings whether it is because they have asthma or other allergies or whether you are buying with children in mind where frequent laundering may be a necessity. Synthetic duvets and pillows have the added bonus of being allergen-free and easy to launder. Our site has many synthetic fillings available including Comforel, Allerban, Suprelle, Microfiber and Coolmax.