Sleep cool and comfortably, thanks to the Allswell 4-inch Memory Foam Mattress Topper Infused with Cooling Diamond Gel. A four-inch layer of open-cell foam provides plush comfort and support, while the real diamond particles keep your sleep surface cool. It is engineered to be two-sided, and features a wave convolution to enhance your supportive sleep experience. Just like our mattresses themselves, they are a cushy testament to our passion for great sleep – blending state-of-the-art materials and smart technology but at a price that’s downright retro. These toppers are designed to take your mattress a level up and make your Allswell dreams even sweeter. Enjoy a good night’s rest with the Allswell 4-inch Memory Foam Mattress Topper Infused with Cooling Diamond Gel.