£349.63

JAY-BE Flex Ultra-Firm Mattress, Pocket Sprung, 21cm Deep, Posture Support Mattress, Hypoallergenic, Breathable, Moisture Wicking, Regulate Temperature, 5ft Kingsize (200 x 150 x 21cm)

Name: JAY-BE Flex Ultra-Firm Mattress, Pocket Sprung, 21cm Deep, Posture Support Mattress, Hypoallergenic, Breathable, Moisture Wicking, Regulate Temperature, 5ft Kingsize (200 x 150 x 21cm)
Brand: JAY-BE
Price: 349.63 GBP
Availability: InStock

White, 838500

Mattresses

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£350 today · previous high £350 · all-time low £300

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Price History & Forecast

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Last 33 days • 33 data points (No recent data available)

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Price distribution over 33 days • 3 price levels

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Most common price: £350 (26 days, 78.8%)

Price range: £300 - £350

Price levels: 3 different prices over 33 days

Description

The firm choice for firm support If you’re looking for a firmer mattress, the Jay-Be Flex Ultra-Firm is specially engineered with orthopaedic principles in mind. Its high-tension spring core provides ultra-firm, resilient support to help maintain stable posture throughout the night. A Firm e-Fibre™ premium comfort layer offers a firm, yet pressure-relieving foundation for added comfort. To help keep you feeling fresh, the Flex is finished with a top layer breathable Advance e-Fibre™, offering a softer sleep surface which enables airflow, to help moisture evaporate for a more comfortable sleep environment. Every feature of the Flex mattress has been carefully considered with comfort, well-being and sustainability in mind. It is made in Jay-Be’s UK factory, which is powered by 100% certified renewable electricity and operates a zero-to-landfill policy. For added convenience, the mattress is vacuum packed and rolled, and comes with a ten-year manufacturer’s guarantee, offering long lasting peace of mind.

Key Features

Flex Ultra-Firm Mattress: High-tension spring core provides ultra firm feel, resilient support to help maintain stable posture throughout the night.

Premium Comfort Layers: Ultimate combination of innovative Firm e-Fibre comfort layer, and HD e-Fibre foundation layer offers a firm yet pressure-relieving sleep surface.

Fresh Sleep Environment: To help keep you feeling fresh, the Flex is finished with a soft top layer breathable Advanced e-Fibre and deep quilted kitted fabric for a luxurious feel.

Hypoallergenic, Odourless Materials: Breathable structure that encourages airflow and helps moisture evaporate, creating a less hospitable environment for dust mites and other microorganisms, reducing unpleasant odours and regulating temperature.

10-Year Manufacturer Guarantee: Made in the UK. 100% foam-free and OEKO-TEX certified, free from harmful chemicals with natural salt-based FR protection. Simply unbox, unroll, and allow it to expand. Plus side handles for easy movement. Size: Standard 5ft Kingsize (200 x 150 x 21cm)

Product Specifications

Brand: JAY-BE
Model: 838500
Colour: White
Size: King (u.k. Standard)
ASIN: B0G59VBJJW
Category: Home & Kitchen > Furniture > Bedroom Furniture > Mattresses & Mattress Bases > Mattresses
Domain: Amazon UK
Listed Since: 05 December 2025

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JAY-BE Flex Ultra-Firm Mattress, Pocket Sprung, 21cm Deep, Posture Support Mattress, Hypoallergenic, Breathable, Moisture Wicking, Regulate Temperature, 5ft Kingsize (200 x 150 x 21cm)

This is the most expensive it has ever been. Walk away.

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