This 24 cm thick king spring mattress is the perfect mattress for those who love a firm and supportive sleep . Made with a high - quality spring core and several layers of foam , this mattress provides superior comfort and stability . The mattress is designed to suit most sleeping positions , with its medium - f irm feel providing optimal support for your body . The spring core ensures an even distribution of weight to reduce pressure points , so you can sleep sound ly through the night . The additional layers of foam provide a plush cushion ing to keep you comfortable , while the breath able fabric allows air to circulate freely for a cool and comfortable sleep . The mattress also features a unique qu il ted design to provide extra