At Lucid, we believe you deserve a mattress that makes you feel your best self—because great sleep makes your day feel like a dream. When looking for firm support in compact spaces, the Lucid 5 Inch Firm Gel Memory Foam Mattress is the perfect match(ress). This mattress is compatible with all types of bed frames and is great for an RV, bunk bed, or child’s bed. A firm feel is ideal for stomach sleepers or smaller sleepers who sleep on their side, stomach, or back. A 1-inch layer of gel and bamboo charcoal infused memory foam and a 4-inch layer of high-density support foam gives a firm feel. The gel infusion helps regulate body temperature and the bamboo charcoal infusion helps keep your bed fresh thanks to its natural moisture-managing properties. Keep dreaming, we've got sleep covered.