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What is a firm double mattress?

The term 'firm' relates to the mattresses tension, whereas 'double' refers to the size of the mattress. When considering whether this mattress is suitable for you, consider both the size and tension.

A double mattress

Double mattresses are incredibly popular as they're spacious enough to occupy two sleepers without proving too large for most bedrooms. When choosing your new mattress, consider the size of your bedroom in relation to your potential purchase. For smaller bedrooms, a small double mattress is a suitable alternative, whereas, for spacious rooms, you're likely to have the luxury of choosing any mattress size.

A firm mattress

Your sleeping position should determine which mattress tension you opt for. With this in mind, consider a firm mattress if you sleep on your front or back, as the firm tension can sufficiently distribute body weight and support spinal alignment. For side sleepers, a softer mattress firmness is required to provide cushioned hip and shoulder support, such as a soft, medium or medium firm mattress.

What's the difference between a firm and an extra-firm mattress?

Both mattress types are designed for front and back sleepers. However, the additional firmness with an extra firm mattress can help to relieve pressure and soothe any minor pains. The best extra firm mattress will be sure to provide the sturdiest sleeping surface you could imagine without compromising comfort.

What types of mattresses are included in our collection?

Open coil

Despite being regarded as a 'budget-friendly option', open coil mattresses offer great support and comfort. This type of mattress features a robust spring unit comprising steel coils to form the mattress core. Open coil options are excellent for firm and extra firm mattresses as they provide strong and rigid support, ideal for any firm mattress. If you're looking for a great night's sleep for an affordable price, an open coil mattress is a great choice.

Pocket springs

A pocket-sprung mattress is a fantastic choice if you're looking for a sleeping solution that provides tailored support throughout the night. Each spring is encased within a fabric pocket and reacts to individual body movements to apply targeted support. Moreover, pocket springs are particularly beneficial for anyone sharing a bed; these springs are recognised for their motion isolation properties meaning any movements your partner makes throughout the night are unlikely to impact your sleep.

Memory foam

Memory foam mattresses are similar to pocket-sprung options in that both mattress types provide a tailored sleep experience. Memory foam adapts to the body's contours to provide cushioned support and comfort.

Gel foam

A Memory foam mattress is often unlikely to be suitable for anyone who tends to sleep hot as memory foam is renowned for its heat retention properties and restrictive air circulation. If you're looking for a breathable mattress but would like body moulding support similar to memory foam, consider a gel foam mattress. This mattress type features a gel layer on the surface to ensure a cool night’s rest.


As with gel foam mattresses, a latex mattress is a fantastic alternative to memory foam for anyone who sleeps hot. Latex mattresses are formed using sap derived from rubber trees and are recognised for their superb elasticity and temperature regulation. Compared to memory foam, latex offers more of a 'bouncier feel' than the sinking sensation you'd experience with a memory foam mattress.

Natural fillings

Mattresses can be categorised into natural and synthetic fillings. Natural fillings are a common fixture among premium matters and offer enhanced support and comfort in addition to being recognised for their temperature-regulating properties. Most of our natural collection includes wool and cotton fillings. Cotton wicks away moisture for a cool and dry sleeping surface, whilst wool is fantastic at regulating temperature. Other natural fillings included in our range are cashmere, mohair and silk, offering incredible comfort for an enhanced night's sleep.

Why shop with Mattressman?

A good night's sleep is within easy reach courtesy of our fantastic collection of double mattresses featuring a firm tension. With the perfect balance between affordability and quality, you can count on Mattressman for a good night's sleep. For the best double mattress, look no further than our excellent range. 

60-night sleep trial

Any mattress purchased alongside a mattress protector qualifies for our 60-night sleep trial providing peace of mind and allowing you to assess whether your new mattress is the perfect match.

Free delivery

Our entire range of in-stock mattresses is eligible for free next-working-day delivery (08.00 am - 06.00 pm).

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