A Luxury knitted mattress cover is soft to the touch, breathable and is flexible for the sleeper, meaning the upholstery fibres underneath can do their job and you get the highest level of comfort. The cover is 100% Polyester fabric and has not been treated with chemicals. 5cm High Density Modified Polyether] A type of polyurethane foam that is known for its supportive and durable properties, making it a popular choice for mattress cores or as a component in mattress toppers. As it is denser than standard polyurethane foam, it is more durable and long-lasting. Higher density reflex foam tends to be more supportive and resilient, but it may also feel firmer. The UKs first 100% foam free monobloc mattress core. The polyester monobloc core offers many performance benefits when compared with standard foam. Made in the UK, Delivery within 7 working days. Somnior Pocket Spring Mattress, High Density Modified Polyether Memory Foam Mattress, Build in Mattress Topper in White Size: Double