This Jason Anti-Bacterial Mattress Topper has been treated with HealthGuard - a proven anti-microbial and anti-bacterial treatment that provides effective control of house dust mites. Providing a wonderfully comfortable additional layer for your mattress, this breathable fully fitted topper has superior loft and is filled with polyester ball fibres with a cassette pocket construction to maintain even support. It is perfect for achieving a restful better night's sleep.