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Rated Excellent
Free Next Day Delivery*
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5 Year Manufacturer's Guarantee
14-day Hassle Free Returns

Rock Hard 6 Super Firm Foam Mattress

Extra Firm
Orthopaedic
Hypoallergenic

Description

Dimensions

Firmness Guide

Warranty & Guarantee

Delivery & Returns

Product Questions

Description

Enjoy high levels of support every night with the Rock Hard 6 Super Firm Foam Mattress. Perfect for those looking for lots of orthopaedic support, this mattress is ideal for various bed frames and offers fantastic value for money.
Super Firm Mattress

Super Firm Mattress

The Rock Hard 6 Mattress has been carefully designed to suit those seeking higher support. Its extra firm rating results from the Blue Super Firm foam, a special type of non-reacting foam. This means that it will not contour to your body like other types of foam, making it perfect for those seeking orthopaedic support.
Soft And Cosy Cover

Soft And Cosy Cover

Enjoy plenty of supportive sleep with the Rock Hard Super Firm Mattress, as it has been created to suit those who do not like the warmth of memory foam or the bounce of a spring mattress. Its Maxi Cool Quilted Cover is soft, offering comfort with a super firm rating.
Perfect For Most Bed Frames

Perfect For Most Bed Frames

With its 6-inch (15cm) depth, the Rock Hard 6 Super Firm Foam Mattress is perfect for most bed frames, including trundles, guest beds, and top bunks. For extra convenience, this mattress is rolled and wrapped in plastic to give you a factory-fresh mattress!

Dimensions

Happy Beds Mattress Sketch Dimensions


3ft Single:

  • A - Width: 90 cm (3')
  • C - Length: 190 cm (6'3")
  • Weight: 19 kg


4ft Small Double:

  • A - Width: 120 cm (4')
  • C - Length: 190 cm (6'3")
  • Weight: 24.5 kg


4ft6 Double:

  • A - Width: 135 cm (4'6")
  • C - Length: 190 cm (6'3")
  • Weight: 28 kg


5ft King Size:

  • A - Width: 150 cm (5')
  • C - Length: 200 cm (6'6")
  • Weight: 30 kg



B - Mattress Depth (Thickness): 15.24 cm (6 inches)

Note: Sizes and Weights are approximates and may vary slightly.

Firmness Guide

Soft

Best for side sleepers and lighter body types, a soft mattress offers deep cushioning, gentle support, and enhanced sinkage for a plush, contouring sleeping experience.

Soft-Medium

Ideal for side and combination sleepers with lighter to average body types, a soft-medium mattress balances gentle cushioning, responsive support, and moderate sinkage.

Medium

Suitable for all sleeping positions and average body types, a medium mattress combines balanced cushioning, reliable support, and controlled sinkage for versatile comfort.

Medium-Firm

Best for back and combination sleepers with average to heavier body types, a medium-firm mattress provides supportive comfort, light cushioning, and reduced sinkage.

Firm

Ideal for back and front sleepers with heavier body types, a firm mattress delivers strong support, minimal cushioning, and very little sinkage for a stable feel.

This Mattress

Extra-Firm

Best for back sleepers with heavier body types, an extra firm mattress offers maximum support, minimal cushioning, and almost no sinkage for a solid sleeping surface.

Warranty & Guarantee

We're sure that you'll love your new item from Happy Beds, but to give you peace of mind, you'll be happy to know all of our products come with a 5-year manufacturer's guarantee as standard.

This guarantee covers any defects in the materials or craftmanship of the product, as long as it has been used during normal domestic use. Find out more in our full manufacturer's guarantee, with our terms and conditions offering more information if needed.

Delivery & Returns

We've made delivering your items easier than ever, with two options to choose from!

Standard delivery

  • FREE* Monday to Friday (weekends chargeable)
  • 1-man service delivered to your hallway
  • Courtesy email and text 24 hours before delivery
  • A 2 to 3 hour delivery slot

Premium delivery

  • Available from only £25
  • 2-man service delivered to a room of your choice (maximum 2 flights of stairs)
  • Courtesy email and text 24 hours before delivery
  • A 2 to 3 hour delivery slot

*Please note that delivery costs, services, and times are subject to availability and will depend on the product selected. Certain postcodes may incur extra charges. Find out more in our delivery policy.

Easy returns

Don't worry if something goes wrong, or you change your mind! We have detailed returns policy that can be found in our replacement, returns and refund page for more information. Please note that returns are subject to our terms and conditions.

Product Questions

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    Reasons to buy from Happy Beds

    Join thousands of happy customers who trust us for quality products and reliable service.

    Start enjoying better sleep sooner with selected products delivered as quickly as tomorrow.

    Buy confidently knowing your investment is protected by long term manufacturer warranty.

    Shop with confidence thanks to our straightforward 14-day hassle free returns policy.

    Out with the old and in with the new, removing the stress from upgrading your bedroom.

    Take the time and stress out of setup with dedicated assembly support UK-wide.

    Add a Mattress

    Firmness Quick Guide

    Soft

    Best for side sleepers and lighter body types, a soft mattress offers deep cushioning, gentle support, and enhanced sinkage for a plush, contouring sleeping experience.

    Soft-Medium

    Ideal for side and combination sleepers with lighter to average body types, a soft-medium mattress balances gentle cushioning, responsive support, and moderate sinkage.

    Medium

    Suitable for all sleeping positions and average body types, a medium mattress combines balanced cushioning, reliable support, and controlled sinkage for versatile comfort.

    Medium-Firm

    Best for back and combination sleepers with average to heavier body types, a medium-firm mattress provides supportive comfort, light cushioning, and reduced sinkage.

    Firm

    Ideal for back and front sleepers with heavier body types, a firm mattress delivers strong support, minimal cushioning, and very little sinkage for a stable feel.

    Extra-Firm

    Best for back sleepers with heavier body types, an extra firm mattress offers maximum support, minimal cushioning, and almost no sinkage for a solid sleeping surface.