Ideal for a bunk bed, trundle bed, or the toddler transitioning to the big-kid bed, the Mainstays 6″ Firm Tight Top Innerspring Coil Foam Mattress provides everyday comfort while not hitting your wallet too hard. This mattress features six inches of durable steel coils and plush comfort foam, this medium-firm mattress will last for years to come leaving you waking up feeling refreshed. The six-inch profile of this spring mattress is perfect for bunk beds, trundle beds, and dorm rooms. Perfect for children and some adults to enjoy sleep or to have comfort putting little ones to bed. The bright white exterior provides a clean and fresh presentation. This is the perfect bunk bed mattress or trundle bed mattress, available in Twin, Twin XL, and Full sizes. This bed-in-a-box ships compressed and rolled, arriving conveniently at your door. Allow 48 hours for expansion, then use your new Mainstays mattress on its own or with any bed frame and box spring. Send it back within 90 days if you are not fully satisfied and we offer a 1 year warranty.