Sweetnight queen size mattress is designed to be flappable with unique 4 layered foams. Allow you to sleep on either side. It’s like having 2 in 1. Great value for money. Gel infused memory foam on the Top keeps you cool, followed by comfort foam, pressure points & keep your body balanced. And the high-density support foam on the bottom for durability and performance, strengthens edge-to-edge support, resists sagging and roll-off.