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Protect your products
5-Year Accident Cover £22

We know how important it is to keep your new sleep products safe, but we also know accidents can happen. With Accident Cover, we’ll help you keep your bed and/or mattress in their very best condition.

We are paid by the insurer through commission, which is included in the premium you pay.

So what is covered?
  • Food and drink spills such as coffee or red wine
  • Ink marks from biros, permanent markers etc
  • Make-up and cosmetic stains
  • Accidental damage caused by pets
  • Burns from heated appliances such as straighteners or curlers
  • Rips and tears
  • Damage causing breakage to the frame
What is not insured?
  • Deliberate damage caused by you or any person
  • General wear and tear
  • Accumulation of damage or staining
  • Any structural or manufacturing defects
  • Accidental staining or damage caused by the use of incorrect cleaning products
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Goes like a dream

WHY NOT TRY OUR AWARD-WINNING SLEEP TECH?

AUTUMN SALE: UP TO 25% OFF SELECTED MATTRESSES ENDS THURSDAY  (T&Cs)
Featured Award

Our products benefit from ongoing innovation. Reviews attributed to a product model reflect views customers have shared for prior design iterations of the same model, as well as the improved iteration offered today.
& 4 Awards
Custom firmness

CustomFlex Pillow

SAVE £32

£159 †

£127.20

Finest quality at lowest price

We give the highest quality at the best price. We're not the cheapest, we use premium materials and production, and do things the right way as a B Corp.
How do we do it?
  • We limit our range & sell volume

    We limit our range & sell volume

  • No stores or commission

    No stores or commission

  • Low waste - we refurbish returns

    Low waste - we refurbish returns

  • Advertising savings - lots of word of mouth!

    Advertising savings - lots of word of mouth!

What is the basis of this discount?

Price today vs identical product offered on our website, 30/09/2025 to 20/10/2025

You'll Love:

  • Adjustable firmness from interchangeable inner pillows

  • Firmer support from unique foam FlexSprings™

  • Down-like comfort from Simba Renew™ in two layers

  • Cooler feel from cotton cover with Stratos® technology

  • Improved airflow from open mesh border

  • Washable, zip-off cover for easy care

  • Includes reusable storage bag

Select your comfort level:

Medium Medium Firm Firm

Our CustomFlex pillow enables you to personalise your support to suit your sleeping style and preferred level of firmness with three interchangeable layers: one with innovative foam FlexSprings™ in a cushioned sleeve, and two made from cloud-like Simba Renew™.

Interchangeable layers, ideal support

Firmer FlexSpring™ layer

Enclosed in a cushioning sleeve – you can’t feel our unique FlexSprings™. Being made from foam, they’re superbly light, sturdy and flexible, providing firmer, stronger support than softer fibres. They’re also breathable, and we’ve designed them to disperse heat for fresher sleep.

Cushioning Simba Renew™ comfort

The other two layers of our CustomFlex pillow are filled with soft, springy Simba Renew™. Made from recycled PET fibres and gently combed into down-like, airy layers, it encourages plenty of airflow through the pillow to keep you feeling cool.

'Cool-touch’ Stratos® technology

The Stratos® technology on one side of our CustomFlex pillow is the secret to helping you stay fresh at night. Designed to offer instant coolness to the touch and help dissipate heat, we like to think of it as a sort of pillow thermostat.

Menopause Friendly

Our products that carry the GenM Menopause Friendly symbol can ease, relieve or support one or more of the 48 signs of menopause.

Working together for maximum comfort

Award-winning tech

See all awards

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Proud to be a B Corp.
We’re determined to have a positive impact, socially and environmentally.

A responsible sleep.
We use CertiPUR® foam and include recycled materials where possible.

Less to landfill.
We offer a Simba-certified recycling and refurbishment service via a trusted third party.

SUSTAINABILITY

A force for good.

Explore our pillows

Full Body Support Pillow Body: The Telegraph 2025

Body Pillow

Stratos® ‘cool-touch’ tech
Great during pregnancy
Support side sleepers

£87.20 £109 †

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Custom Height + Firmness Pillow Hybrid: Which? Best Buy 2025

Hybrid™ Pillow

Adjustable height/softness
Stratos® ‘cool-touch’ tech
Washable quilted cover

£87.20 £109 †

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Currently viewing

Extra Stability Pillow Firm: Trusted Reviews

CustomFlex Pillow

Adjustable height/firmness
Stratos® ‘cool-touch’ tech
Washable quilted cover

£127.20 £159 †

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Lower price tech

AeroDown Pillow

Down-like feel
Stratos® ‘cool-touch’ tech
Airy comfort

£60

Compare

350,000+ five-star reviews* (and counting)

Read Reviews

Excellent

I am a side sleeper and this pillow offers the perfect blend of firmness and support which I need. I was suffering from neck and shoulder pain previously and this pillow has definitely helped.

Jagdeep S
CustomFlex Pillow

Does what it says!

Couldn't see how a pillow could stop me overheating and reduce the night sweats but it does! Very comfortable and no longer have to keep swapping pillows or moving positions in bed to keep cool.

Natalia B
CustomFlex Pillow

Fantastic night's sleep!

After years of trying to find the perfect pillow for side sleeping, the Simba pillow has been the solution - the choice of how to layer the inserts is a game changer!

E W
CustomFlex Pillow

We strive to deliver the best possible products and services. Reviews attributed to a model of a product or to services reflect reviews left for previously offered design iterations of a model of product or a service, as well as the optimized and improved iteration of the product or service offered today.

Happy Sleepers

We rest better when we know your honest opinion of us. Check out reviews from Simba sleepers below.

£127.20

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Please note the finance figures shown are for illustrative purposes only. Details of the actual figures will be available during the finance application process.

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