We've extensively researched top-rated mattresses and tracked price histories to find the best Prime Day mattress deals to shop during Amazon Prime Day 2025.

What we like: Our top memory-foam mattress topper pick is a good option for back- and stomach-sleepers. Offers medium-firm supportive and body-conforming comfort that's not overly sinky. Provides great motion isolation. The removable, washable cover has corner straps to keep it snugly on the bed.

Serta is a well-known brand in the mattress industry. This pick is the deepest of our mattresses at 14.5" and is plush for side sleepers who prefer extra comfort at the shoulders, hips and lower back. The Casper Original Hybrid mattress comes with Zoned Support which gives you specific support for different parts of your body.