The short and simple answer is NO! We’ve specially engineered the Big Fig Mattress with a combination of high quality individually-wrapped coil springs and high density foams to deliver an exceptionally comfortable and durable sleep surface. It will not sag, even with two plus-size sleepers (up to 1,100 lbs. total weight). But don’t just take our word for it. The proof is in the pudding, and we have the test results to prove it. An independent lab tested our mattress by simulating 20 years of use with an oversized 350 lb. rolling weight. The Big Fig Mattress outperformed any published industry test results with virtually no measurable surface impression (less than 0.2”). View the complete test results here.