PRIMESOFT Full Size 4 Inch Mattress Topper - 2-in-1 Dual Layer Design (2" Gel Memory Foam + 2" Plush Pillow Top) - 100% Waterproof, Medium-Firm Support for Pressure Relief & Back Pain (Black) — Open-Box, 27% Off

2-in-1 Adjustable Comfort Design — Choose between 2" cooling gel memory foam for firm support or a 2" soft plush pillow top for pressure relief. You can even stack them for a luxurious 4" mattress topper. Enjoy a fully customized, perfect sleep every single night.

Built-in Waterproof Protection： Featuring a waterproof layer integrated into the bottom of the mattress cover, it effectively blocks liquids, sweat, and accidental spills from reaching the memory foam core. This keeps your mattress hygienic, extends its lifespan, and ensures completely hassle-free maintenance—just pop it in the washing machine for an easy refresh.

Superior Pressure Relief & Back Pain Support： The high-density memory foam reacts to your body heat and weight to perfectly contour to your curves. This helps distribute pressure evenly across your hips and shoulders, offering excellent relief for anyone suffering from back pain or aches.

Revitalize Your Old Mattress: Instantly upgrade your firm or aging mattress into a luxurious, medium-firm sleep surface without buying a brand-new bed.

Compression Rebound Instructions: Delivered in compressed packaging, this mattress topper may appear thinner initially. Please allow 24–48 hours for it to fully expand and return to its original shape after unpacking. Gently patting the topper can help speed up the rebound process for quicker use. Any slight new foam smell will dissipate over time.

The waterproof mattress topper breaks through traditional limitations and cleverly integrates the three core advantages of "soft touch", "thick support", and "professional waterproofing" to create an ideal bedding that is suitable for all seasons, allowing sleep to bid farewell to moisture concerns and only be comfortable and stable. Whether resting alone or sleeping together, the solid thickness can provide stable support, reduce turning interference, and protect deep sleep. Especially suitable for families with children and pets, keep the mattress clean and dry at all times, and extend its service life.