This deal from Wowcher
From £14 (from e-Home Store) for an air flow mattress topper – choose from five sizes!
Keep cool in bed with this air flow mattress topper. 5cm of mesh fabric allows fresh air to circulate while you sleep. Dust mite proof – perfect for those suffering from allergies. With elasticated corners to hold it firmly in place. In five sizes (see below). Machine washable.