Includes: L Class 13.75" Extra Firm Mattress and Black Class 5” Foundation The L-class extra firm mattress set is the perfect balance of support and comfort Highlighted by a high definition cool to the touch cover, this mattress shines with four different pressure relieving foam layers. This is exactly what you need to minimize tossing and turning as you get a great night’s sleep. It is paired with a sturdy low profile foundation to form your ideal resting place after a long day.