This is the superior depth version of the White Noise dual-sided breathable water-resistant foam-free spring mattress. It is built around the traditional double-insulated 13.5-gauge open coil spring unit with a deeper layer of polyester comfort fillings on both sides, covered in a blue, breathable, water-resistant fabric. To get the best from your new dual-sided mattress, we recommend turning it and rotating it regularly. As this mattress is rolled up in a box for delivery, it does not come with side supports. Please note – wipe clean and dry as soon as possible after accidents. Do not use bleach, abrasive cloths, or abrasive cleaning products on this mattress.