Ideal for main bedrooms, master suites, deeper bed frames and anyone who wants a hotel-depth bed at home.Our deepest mattress, and the closest thing to a hotel bed. At 30cm the comfort layer is the most generous we make, so you settle into the surface rather than resting on top of it.The depth changes how the mattress feels rather than how firm it is. There is simply more foam between you and the base, which softens the initial contact and makes the surface feel more forgiving from the moment you lie down. It also fills a deeper bed frame properly - a shallow mattress in a high-sided divan or ottoman can leave the sides looking sunken.Visco-elastic memory foam responds to body heat and moulds to your shape, supporting the spine and neck and spreading your weight so pressure points stop waking you. A denser layer beneath keeps you level, and because the foam absorbs movement rather than passing it across the bed, you are far less likely to be woken when your partner turns over.Its open-cell structure lets air circulate freely rather than trapping heat, and the foam is dust mite and mildew resistant - worth knowing if you suffer with asthma or allergies.The foam is CertiPUR certified, meaning it is independently tested and free from heavy metals and dyes. Both the materials and the mattress itself are made here in Britain, in a state-of-the-art facility in the heart of Yorkshire, and the whole mattress is tested to UK fire safety regulations.The soft knit cover unzips completely and machine washes, so the mattress stays fresh for years rather than months.Available in all standard UK sizes, from Small Single to Super King.One practical note before you order: a mattress this deep needs deep-fitted sheets, and it will sit noticeably higher on your bed frame. Worth checking both.Your mattress is delivered rolled and boxed, which makes it far easier to carry up stairs and through narrow doorways than a conventional mattress.