At Lucid, we make beds for the whole family—because when you wake up feeling your best, your family gets the best version of you too. When looking for a firm support, the Lucid 5 Inch Firm Gel Memory Foam Mattress is the way to go. Made to perfectly fit, the Twin mattress will match with any Twin bed frame and is great for an RV, bunk bed, or child’s bed and is perfect for side, stomach, and back sleepers. A 1-inch layer of ventilated gel memory foam and a 4-inch layer of high-density support foam gives a firm feel. The gel memory foam layer helps regulate body temperature. Plus, the bamboo charcoal infusion helps keep your beds smelling fresh thanks to its natural hypoallergenic properties. Comfort awaits. .