Extra Firm Mattresses
For the firmest, most supportive sleep surface, explore our extra firm mattresses at Rest Relax. An extra firm mattress keeps your spine properly aligned with minimal sink — ideal for back and front sleepers, heavier sleepers, and anyone who finds standard mattresses too soft. Choose from high-density reflex foam and orthopaedic spring builds across every UK size. Discover dependable, long-lasting support that helps you wake up free from aches and stiffness.
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Hardrock Super Firm Reflex Foam Mattress – Firm Orthopaedic No-Spring Support
Original price £119.99Original price £119.99 - Original price £419.99Original price £119.99Starting from: £99.00£99.00 - £399.00Current price £99.00In stockWant a genuinely firm bed without the heat of memory foam or the bounce of springs? The Hardrock Super Firm Reflex Foam Mattress is built around a ...
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Anchor Pro Support Foam Extra Firm Mattress – 25cm Flippable Extra-Firm Orthopaedic
Original price £219.00 - Original price £419.00Original priceStarting from: £219.00£219.00 - £419.00Current price £219.00In stockWant the firmest support in a deep, double-sided build? The Anchor Pro Support Foam Extra Firm Mattress is our firmest orthopaedic option, built fr...
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Anchor Support Foam Extra Firm Mattress – 20cm Extra-Firm Orthopaedic Support
Original price £189.00 - Original price £349.00Original priceStarting from: £189.00£189.00 - £349.00Current price £189.00In stockNeed the firmest possible support? The Anchor Support Foam Extra Firm Mattress is our hardest mattress, built from a 20cm reflex foam core — 40 den...
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