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The Serta Sleeptrue Firm is a 6-inch twin memory foam mattress sold compressed in a box. It layers cooling gel memory foam over Pillow Soft Aire foam and a dense foam core, giving a firm, supportive feel with some contouring on top. At 6 inches it is thinner than most adult mattresses, so it suits bunk beds, trundles, day beds, dorm rooms and guest rooms rather than a primary adult bed. Against rival boxed mattresses it is a plain three-layer build without springs or a reinforced edge, and its value comes from the Serta name and firm support at a low profile.
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This 6-inch twin mattress from Serta is made with cooling gel swirled into memory foam. The gel memory foam adds airflow, heat dissipation and contouring comfort. It has a firm feel and a tight top.
The mattress has three layers. A Pillow Soft Aire foam layer adds cushioning and airflow. A Serta Foam Core at the base gives consistent support from edge to edge. A soft, breathable fabric blend cover sits on top.
It fits bunk beds, trundle beds and day beds, and suits a kids room, dorm room or guest room. It arrives compressed in a box. Open the box, unroll the mattress and let it unwind. It can take up to 72 hours to fully expand and one to two weeks to air out.
