A single layer of springs gives a uniform and stable sleeping surface. A layer of foam adds a cushioning feel. Bonnell springs have an open construction that allows air to circulate and the mattress to breathe. The complete mattress is covered by a 10 year guarantee. You can read about the terms in the guarantee brochure. The mattress is roll-packed so it’s easier to bring home Add a pillow that suits your sleeping position and a mattress protector to keep the mattress clean. Bonnell springs are especially suitable for those who sleep alone, since the movements of the springs won’t disturb anyone else, for example if you have a habit of getting up for a midnight snack.