The Big Fig Mattress is a one sided mattress built with all the comfort layers on top, so you’ll never need to flip it. It is important, however, to "rotate" your Big Fig Mattress on a regular basis, every month during the first six months and every 3-4 months after that. The more frequent, the better! Simply exchange the head and foot of your mattress to help distribute the upholstery materials and comfort impressions to fully utilize your mattress. Comfort impressions will occur naturally and are not structural defects.