Indulge in deeper, more restorative sleep with the Aveline 6" Narrow Twin Mattress. Topped with breathable gel-infused memory foam to keep your body climate steady and cool, this mattress dissipates body heat with abundant ventilation while quickly conforming to your weight and position for ultimate comfort. Sleep peacefully with an open-cell memory foam mattress that relieves pressure points and delivers welcome relief from the aches and pains of traditional mattresses. Aveline is CertiPUR-US® certified by accredited independent testing laboratories, so you can be confident that the memory foam is made without fiberglass, formaldehyde, ozone depleters, mercury, and other heavy metals including PBDEs, TDCPP or TCEP ("Tris") flame retardants, and is low on VOC. The mattress ships directly to your doorstep. It takes 2 to 4 hours for the mattress to expand most of the way and a day to expand fully. Includes a removable stretch knit diamond patterned cover. Box spring or foundation is optional. Slatted bases should be less than 3" apart. Overall Product Dimensions: 75"L x 30"W x 6"H