Silentnight's open coil spring system with 323 springs provides support to your body from head to toe for less partner disturbance. Traditionally handcrafted in the UK using hypoallergenic fillings, this mattress is tried and tested in Silentnight's in-house sleep lab to guarantee the quality you'd expect from the brand. This is a double-sided mattress, so you'll need to rotate and turn it regularly to ensure longevity. With firm comfort, this mattress is great for people who sleep on their backs mostly. At Silentnight, it's essential that everyone experiences a great night's sleep. That's why they've put their 70 years of bed-making expertise into their new great value mattresses called essentials. Essentials mattresses are everything you expect from the UK's most trusted bed brand, incorporating quality springs and fabrics for all-night-long support and comfort. Size: Kingsize (5')