Sleep Innovations 3-Inch Sculpted Memory Foam Queen Mattress Topper 3-inch thick sculpted SureTemp memory foam topper provides greater airflow compared to traditional memory foam Reversible design provides 2 unique sleeping surfaces Removable, machine-washable jersey knit cover; Cover prevents topper from sliding around on mattress After unpacking, allow up to 72 hours for topper to fully expand; lower cost alternative to mattress purchase 10-Year Limited Warranty