WOLF Corp Double Sided Reversible Ultra Firm, Wrapped Coil innerspring Mattress, Twin XL, Bed in a Box, Made in The USA Double sided mattress that can be flipped Contains a 6", 560 wrapped coil unit with fortified edge support that decreases partner disturbance A Wolf bonded fiber pad for extra support Stretch knit cover with CertiPUR convoluted foam for comfort Made in the USA