Reign Monarch Cool Gel Mattress - Medium Firm

Reign Monarch Cool Gel Mattress - Medium Firm

Single 3ft
£199.99 SAVE £110 £309.99
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Reign Monarch Cool Gel Mattress - Medium Firm

Reign Monarch Cool Gel Mattress - Medium Firm

£199.99 SAVE £110 £309.99
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Why Choose Reign Monarch Cool Gel Mattress?

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Advanced Cool Gel Technology

Engineered to dissipate heat and help maintain a cooler sleep surface throughout the night.

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Temperature-Regulating Comfort

Designed for sleepers who prefer a fresher, less overheated sleeping environment.

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Pressure-Relieving Support

Cool gel-infused comfort layers gently cushion pressure points while supporting proper alignment.

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100 Night Trial

Experience cooler, more comfortable sleep in your own home before making your final decision.

Size
Free delivery in 5–7 days

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60 Night Risk Free Trial
Full refund + Free Returns if you don't like it
Easy Assembly
No complex tools or DIY expertise needed to assemble
5 Year Warranty
Full Cover Against Any Manufacturer Defects

Monarch Memory Cool Gel mattress is designed to combine pressure-relieving memory foam with cooling gel technology, helping reduce heat build-up while still giving that supportive “memory foam hug” feel. The key things buyers usually look for in this type of mattress are cooling performance, spinal support, motion isolation, and durability. Gel-infused foam is specifically made to sleep cooler than traditional memory foam by dispersing body heat more effectively.  
The 25cm Luxury Mattress works well for people who want the contouring comfort of memory foam without overheating at night. The hybrid construction also improves edge support and airflow compared with older all-foam designs. Gel foam mattresses are known for better temperature regulation and pressure relief.

We offer free delivery on all orders. Estimated delivery time is 5–7 working days, excluding weekends and UK bank holidays. Our mattresses are delivered unrolled and ready to use. Our delivery team will contact you to arrange a suitable delivery day and provide an estimated arrival window where available. Please make sure someone is available to accept the delivery and that the access route is clear. If your order arrives damaged or you have not been contacted within 7 working days, please contact us at hello@reignsleep.co.uk

We offer a 100-night sleep trial so you can decide with complete peace of mind. Please refer to our returns for more information

Why It's Right for You

What it does for you

Cools pressure points

Cool gel comfort helps cushion your shoulders, hips and back while reducing heat build-up.

Supports better alignment

A medium-firm feel helps keep your body supported without feeling too hard.

Keeps sleep calmer

Motion-absorbing foam layers help reduce movement for a more peaceful night.

Best for you if...

You want cooling comfort with medium-firm support.

You often feel warm and want a fresher sleep surface.

You want pressure relief with less partner disturbance.

Try it at home with a 100-night trial.

What's Inside

What's Inside

Find Your Perfect Feel

We’ve rated this a 8 out of 10.

A comfortable medium feel with cooler comfort and supportive pressure relief.

MEDIUM
Soft Medium Medium Firm Firm
1 3 7 10
Reign Monarch Cool Gel Mattress - Medium Firm

WHY Reign Mattress?

Luxury mattresses, honest prices, built for better sleep.

We make premium mattresses more affordable by cutting out unnecessary showroom markups and selling directly to you. That means better value, reliable quality and lasting comfort long after your mattress arrives.

5 Year Warranty

5 Year Warranty

Enjoy complete peace of mind with our 5-year warranty. Designed to protect against manufacturing defects, it ensures lasting quality and confidence in your purchase.

100 Night Trial

100 Night Trial

Try your new mattress at home for 100 nights. We want you to feel completely comfortable with your choice, not rushed into a decision.

Made in Britain

Made in Britain

Our mattresses are handmade in the UK by skilled makers using quality materials, giving you comfortable support and lasting sleep quality without the inflated showroom price.

Cool Gel Technology
Spinal Alignment Support
Durable Edge Support
25cm Luxury Depth
100 Night Trial
Free UK Delivery
5 Year Guarantee