Mattress: Get a kids' luxury open sprung mattress. Plush design: Contains five layers of comfort fillings over a 13.5 gauge open coil spring unit and covered in a hardwearing blue check fabric. Two sizes: Choose between single and 4ft small double sizes. Comfortable: The Bonnell open coil spring unit allows the weight to be distributed evenly across the mattress so your little one can enjoy the most comfortable night's sleep. Dual sided: Simply rotate or turn over your mattress regularly to keep it in pristine condition. Versatile: Suitable for all base types including bunk beds, cabin beds and triple sleepers.