Mainstays 6 in Firm Tight Top Innerspring Mattress, Twin

The Mainstays 6 in Firm Tight Top Innerspring Mattress in Twin size is built with a low profile that suits space-conscious sleeping setups. Its 6 in height makes it a practical fit for bunk beds, trundle beds, and dorm rooms, and it also works for a toddler's move to a bigger bed. The firm tight-top surface and innerspring construction give it a stable, straightforward feel for everyday sleep. It arrives compressed in a box for easier setup; after unboxing, allow 48 hours for the mattress to fully expand. You can use it with a platform frame or a traditional box spring, so it fits a range of supported foundations. Check the specifications below to confirm the exact dimensions, materials, coil construction, and warranty details.