🇬🇧 United Kingdom · Reflex Foam vs Hybrid (foam & springs)

Flex 1000vsTweak

Which one is best for you? Flex 1000 vs Tweak - 2026 comparison by Vs Mattress

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Flex 1000Save up to 70%TweakCheck current deal.

Flex 1000

by Flex 1000 · Reflex Foam

Save up to 70%

Tweak

by Tweak · Hybrid (foam & springs)

Check current deal.

10 · 100-night trial

Pricing by size

Flex 1000

Single£242.98

Double£278.98

King£332.98

Super King£404.98

Tweak

Single£595

Double£895

King£995

Super King£1,095

Essential information

	Flex 1000	Tweak
Type	Reflex Foam	Hybrid (foam & springs)
Launched	–	2014
Brand	–	–
Made in	United Kingdom	United Kingdom
Unique points	The Flex 1000 mattress by Happybeds is a single layer mattress: High density Reflex Foam	Four layer, customisable hybrid construction: 4cm foam 5 customisable comfort zones with 4 different densities of deep foam 10cm individual pocket springs (coil count: 1,000) The springs are encapsulated in a high density, supportive foam that makes up the base and the mattress walls. They're then covered in a medium density reflex foam that ensures you feel the bounce of the springs below. Note: This brand has changed hands so many times, it's hard know the current quality of the mattress.
Video	–	Tweak Hybrid Customizable Foam Mattress review - 2021

Certifications & trial

	Flex 1000	Tweak
OEKO-TEX®	No	Yes
CertiPUR-US®	No	Yes
Certifications	–	–
Other certification info	–	–
Sleep trial	–	100 nights
Warranty	5	10
Free shipping	FREE	FREE
Free returns	–	–
Pay later	No	No
Delivery info	Standard FREE. If you have chosen a delivery date at checkout, the order will be delivered on this date.	With no hidden charges, we offer all our mattresses with a free two man delivery service within 3 working days to mainland UK.

Firmness & feel

	Flex 1000	Tweak
One firmness fits all	No	No
Select your firmness	No	No
Adjustable firmness	No	No
Half and half firmness	No	No
Flippable / reversible	No	No
Firmness info	–	–

Construction & materials

	Flex 1000	Tweak
Layers	High density Reflex Foam	foam, customisable comfort zones with 4 different densities of deep foam, individual pocket springs
Cover	The Flex 1000 is crafted with sanitised materials which make it hypoallergenic and Anti-Dust Mite. This mattress is perfect for those who have allergies and asthma.	Hypo-allergenic, plush fabric cover. Our visco-elastic polyester blend cover provides a breathable sleeping surface. It's fire resistant and provides temperature control, plus it's hypo-allergenic making it ideal for those with dust or skin allergies. The zippable cover can be machine washed at 30 degrees and air dried, keeping your mattress fresher for longer.
Machine-washable cover	No	No
Ergonomic handles	No	No
Comfort	The reflex foam provides extra support. It is sanitised and guarantees complete hygiene. It stores less body heat than the memory foam.	The Tweak mattress (formerly known as the Nrem mattress) is designed to help all sufferers of chronic pain, including back pain. You can design your very own sleep experience by adjusting the foam tablets inside the mattress to give bespoke comfort and support to suit your specific pain needs. Pressure relieving, cooling comfort layer. This 4cm deep comfort layer contours and cushions the body for a greater level of comfort. The open cell structure wicks away moisture and keeps you cooler for longer.
Support	This type of mattress is ideal for those having back and joint problems. It is known to relieve pressure on joints and the spine with all-around support.	5 customisable comfort zones with 4 different densities of deep foam. We use highly resilient Polyurethane foam in super soft, soft, medium and firm densities so you can get comfort and support in all the right places. This foam bounces back quicker than standard memory foam so you can turn over without feeling stuck. Our 5 comfort zones can be changed at any time so you can get your best night's sleep. 1,000 individual pocket springs for superior support and bounce. 1,000 full size pocket springs make up the mattress core. They're individually wrapped and move independently as you sleep, so you won't be disturbed by your partner's tossing and turning during the night. Our springs measure 10cm high and have a gauge of 1.5mm. As the springs are encapsulated in highly resilient base foam you get edge-to-edge support.
Posts	–	–

Size & weight

	Flex 1000	Tweak
Available sizes	Single, Small Double, Double, King, Super King	Single, Double, King, Super King
Dimensions	Single depth: N/A	Single depth: 25 cm
Single weight (kg)	15	23
Double weight (kg)	20	34
King weight (kg)	23	40
Super King weight (kg)	26	47

Wrap up

Thank you for checking out this Flex 1000 vs Tweak mattress comparison. We have tried to compare all the necessary information to help you choose which mattress is the most suitable for you.

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