The Sierra Sleep MyGel® Collection provides a supportive all foam bed featuring top layers of Gel Memory Foam to conform to your body for a good nights sleep. These quality, value priced beds come in a 7", 9", 11" and 13" varieties so you're sure to find the one that is right for you. The 9" and thicker mattresses come with a Fresh Air Base foam that has a honey comb pattern that allows more air to flow through it. Each bed comes with a Luxurious Upgraded Knit Cover.