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Best For All Positions
Helps with Disturbance
Helps with Allergies
Helps with Pressure Relief
Thermal Control All Season
 

One Third

OneThird Ortho Plus Mattress

OneThird Ortho Plus Mattress

Regular price £479.95 GBP
Regular price £575.00 GBP Sale price £479.95 GBP
Sale Sold out
Taxes included. Shipping calculated at checkout.
Posturepedic Springs
Eco-friendly Fibres
26cm Depth
Tencel™ Cover
Single Sided
Firmness: Firm
5 Year Warranty
Free Delivery
Size
Quantity
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Description

The OneThird Ortho Plus Mattress is a supportive, pocket sprung mattress. It's made with sustainably sourced comfort fillings and includes a supersoft knitted cover.

Sprung support

1000 individual pocket springs are encased in single fabric pouches. Pocket springs work independently, responding to your body shape and absorbing any movements during the night. This mattress is an excellent choice for couples. The lack of roll-together means you are less likely to disturb - or be disturbed by - your partner.

This mattress also has firm orthopaedic support, which is specially designed to enhance support for your back. It helps align your spine and relieves aches and pains! It is a great mattress for people who suffer from back pain or back problems.

Plush, recycled fillings

This mattress is entirely foam-free and chemical treatment-free. The polyester comfort layers used are made from recycled materials, as well as being highly breathable so that you stay cool and fresh throughout the night.

Healthy sleep

It features a super soft knitted cover, which is hand-tufted to lock the fillings in place for longer, high-performance use. If you suffer from allergies, you'll be pleased to know that this mattress is entirely hypoallergenic which reduces allergens for a cleaner, healthier sleep.

No flips, just rotate!

As this mattress is single-sided there's no need to flip it. However, we do recommend that you rotate it once a week for 2-3 months and then monthly thereafter. This will ensure even wear across the sleep surface of the mattress.

Made in Lancashire

With over 100 years of experience, you can be sure you are choosing a quality product. The experts at Rest Assured truly believe in quality over quantity! With a 5 Year Guarantee, you can get the most out of your purchase, as well as the most out of every night's sleep.

Benefits

  • 1000 individual pocket springs react to your movements and body shape
  • Springs are sewn into individual fabric pockets to prevent partner disturbance
  • Zoned to support key points such as the back and hips
  • Sustainable and highly breathable polyester comfort fillings
  • Hypoallergenic and free from foam and chemical treatments for a healthier sleep
  • Medium to firm for a more supportive feel
  • The soft-touch knitted cover provides a dreamy surface you can snuggle into
  • Hand tufting secures the fillings in place, to improve the mattress' lifespan
  • It's single-sided, so there's no need to flip it
  • Mattress depth: 24cm
  • Handcrafted in Lancashire
  • 5 Year Guarantee

    Weights: Single: 19kg, Double: 29kg, King Size: 34kg, Superking: 40.5kg

Disclaimer: Each mattress spec is reflected in the description and details on the page, Please note however that the outside cover can sometimes be a bit different to the images reflecting on the season and time of year

Delivery

We provide our award-winning Free Next Day Delivery service to most locations, sending a proper night’s sleep out far and wide. Hassle-free and convenient, you can even choose a time and day that suits you, have us take your old mattress away for recycling, and get us to deliver to your room of choice!

In some places, a small fee will be charged to help us get you your best night’s rest as quickly as possible. Take a look at the following postcodes to see if this applies to you, and if you’re not sure, then use our helpful Postcode Checker to help you shop with confidence.

  • AB10-AB16, AB21-AB25, AB30-AB39, AB41-AB45, AB51-AB56
  • CA1-CA9
  • DD1-DD11
  • DG1-DG14, DG16
  • EH1-EH49, EH51-EH55, EH91, EH95, EH99
  • FK1-FK21
  • G1-G5, G9, G11-G15, G20-G23, G31-G34, G40-G46, G51-G53, G58, G60-G79, G18-G84, G90
  • IV1-IV19, IV30-IV32, IV36
  • KA1-KA30
  • KY1-KY16, KY99
  • LA1-LA7
  • ML1-ML12
  • PH1-PH26
  • TD1-TD15

30 Night Sleep Trial

Sleep on your new mattress in the comfort of your home for a full 30 nights. Take your time to feel the support, comfort, and pressure relief it provides.

If you’re not completely satisfied within the trial period, you can return or exchange it with no hassle and no stress.

We want you to be confident that your mattress is the perfect match for your sleep.

Warranty & Guarantee

Rest easy knowing your mattress is protected with our 5-year warranty. Crafted with quality materials and long-lasting comfort in mind, your mattress is designed to stay supportive night after night.

If any manufacturing faults or defects appear within the warranty period, we’ll repair or replace your mattress — no hassle, no extra cost.

Your comfort and peace of mind are always guaranteed.

Why Choose One Third

3 Year Warranty & 30 Night Trial

We're committed to your satisfaction and offer a 3 Year Warranty & 30 Night Trial on all products. If you're not happy with the product, within 30 days of your purchase, we'll refund your money and pick up the bed at NO cost to you

Complete Buyer Protection

Buy with confidence with PayPal, pay in installments or pay cash on delivery. We offer a variety of payment methods to suit your needs

Made in Britain – Comfort Delivered Fast

Enjoy your new mattress in no time with zero hassle. All our mattresses arrive ready to use — simply unbox, let it expand, and relax. No tools, no complicated setup, and no DIY expertise required.

Designed and manufactured in Britain for comfort, quality, and convenience.