Amazon.ca: Czpalo 3 Inch Gel Memory Foam Mattress Topper Queen with Bamboo Cover - $74.99

Czpalo 3-inch gel memory foam mattress topper Queen is on Amazon.ca. Comes with a removable/washable bamboo cover, adjustable straps, and a non-slip bottom. Also shows CertiPUR-US / OEKO-TEX certification on the product page. Could be useful if your mattress feels too firm and you want a bit more cushioning without replacing it.