Milliard Tri Folding Mattress | Ultra Soft Washable Cover | Queen {78" x 58" x 4"} COMFORTABLE - This folding mattress is plush, soft, breathable, and super comfortable. PORTABLE - This mattress folds easily for travel or storage and is perfect for small apartments and tight spaces. CONVENIENT - The removable bamboo cover is machine washable for easy care. DURABLE - Built to last and made of 4 thick luxe certified foam that wont lose its shape. SIZE - Open mattress measures 78x58x4. Folded mattress measures 58x26x12.