Made of memory foam and supportive high density base foam, our 5-inch mattresses deliver optimal comfort to maintain proper sleep posture while offering targeted support to keep the spine in its natural position. Works well with different types of bed bases, including adjustable bases and box springs. | Furniture Of America | | 5" Memory Foam Mattress, CertiPUR-US, Spine Support, Guest Mattress, Roll in a Box, Breathable Medium Firm RV Mattress | White | Best Buy