Bonnell Spring Medium Firm Mattress DoubleWho needs a Bonnell Spring mattress? The answer is someone who wants a relatively firm and comfortable sleeping surface. And that's what you get with the Giselle Beddings Bonnell Spring Mattress. Unlike a pocket spring system, a Bonnell spring system uses springs that are hour-glass shaped rather than all of the same diameter. The result is a somewhat firmer mattress than a pocket spring version. The benefits include better support for your body, more resilience and better ventilation. Our Bonnell Spring Mattress delivers all of the above with a level of comfort that surpasses your expectations. The Mattress is meticulously constructed with layers of premium materials. A high density foam fills the inside of the mattress in between the stable Bonnell spring core while the exterior is fully wrapped with a luxurious polyester fabric. Not least, a soft quilting layer rests on top of the entire ensemble. Essentially, you get a solid mattress that retain its shape well for longlasting use and yet supple and comfortable to enjoy all its inherent benefits for you. As with all of our quality mattresses, the Bonnell Spring Mattress is allergy-free and treated for dust and mould resistance.