The Small Double Coolmax® Mattress Cover is the perfect replacement cover, featuring a breathable, moisture dispersing fabric for a cool & undisturbed night's sleep. Coolmax® is a moisture management fabric which promotes fast drying & cooling, to provide the perfect microclimate for your body, making it an ideal choice to freshen up an old mattress & offer a peaceful & comfortable sleep environment. This Coolmax® mattress cover will fit a 15cm deep, small double size mattress.