The Cozyway Vertical Bi-Fold mattress is designed specifically for RV slide-out bedrooms where the mattress needs to fold when the slide is retracted. The 75" x 60" short queen splits vertically along the width into two 30" halves - sized to clear the wall when the slide closes. Open it back up and it lays flat as a full mattress. At 6" thick, the Comfort Core foam construction provides pressure relief and breathability for a comfortable night's sleep on the road. The high-resiliency foam holds its shape and bounce across multiple seasons of regular use. CertiPUR-US certified, the foam is formed without ozone depleters, PBDEs, TDCPP, or TCEP flame retardants, mercury, lead and other heavy metals, formaldehyde, or phthalates. Low VOC emissions meet indoor air quality standards worth noting in the close quarters of an RV bedroom. Ships compressed in a box, making it manageable through narrow RV entryways and hallways.• 75" x 60" short queen, folds vertically at 30" for slide-out clearance• 6" thick Comfort Core foam for support and breathability• CertiPUR-US certified no ozone depleters, heavy metals, or formaldehyde• Low VOC emissions for indoor air quality• Ships compressed in a box for easy RV delivery CertiPUR-US certified foam, no heavy metals or formaldehyde High-resiliency foam holds its shape through extended use Ships compressed in a box for easy RV delivery | Cozyway Vertical Bi-Fold RV Short Queen Mattress, 75 x 60 in 6 in | Mattress in a box