This topper is like getting a split king without needing to replace your entire mattress, and it gives an option for folks who prefer a queen-size mattress (or can only fit a queen in their bedroom).

Buy Linenspa 3 Inch Gel Infused Memory Foam… $114.74. 2. Sleep Innovations 4-inch Dual Layer Gel Memory Foam Mattress Topper. This is a two-part topper, including a two-inch foam piece under a ...