“Choose a Sealy by its spring unit and its feel first, and only then by the shop, because the same Posturepedic technology can cost hundreds of pounds more under one retailer's model name than under another's. Sealy runs no sleep trial of its own, so the trial you get is always the retailer's.”
How the Sealy range is organised
Sealy Posturepedic is the top of three families, with 16 of the 31 mattresses on sealy.co.uk across the Exquisite, Elevate UltraLux, Elevate Ultra and Elevate collections. Below it sit nine Sealy Select models and six Sealy Classics, which include the double-sided Ortho Plus line. Every Sealy UK mattress is handmade in Cumbria, according to Sealy’s history page. Since October 2020 the brand has belonged to Sealy United Kingdom Limited, a 50/50 joint venture between Tempur Sealy International, the maker of TEMPUR, and its Asian partners, which took the UK licence back from Silentnight after 47 years, according to Tempur Sealy’s announcement.
The same technology under different names
Sealy does not sell from its own website, and the big retailers commission their own model names. Mattress Online sells Posturepedic models called Blackwood, Holst and Webber, the Newton is made for Bensons for Beds, and Mattressman still sells the Steeple Ortho Plus. Neither the Steeple nor the Mellbreak Ortho Plus, which Mattress Online, Mattressman and The Sleep Shop sell, appears on Sealy’s Ortho Plus page, which lists the Grasmoor, Scafell and Baystone. Compare a Sealy by collection, spring unit and feel rather than by name, and read little into the RRP. Mattress Online’s product data gives the Blackwood single an RRP of £1,299 and a selling price of £723.
Double prices are regular prices checked on 28 September 2026. Mattress Online then took about 17% off the Blackwood double and 7% off the Mellbreak, The Sleep Shop 25% off the Hawking, Turing and Blake.
Guarantee and trial depend on where you buy
Sealy’s guarantee terms give 7 years on Sealy Posturepedic and 5 years on Sealy Classics, the family Ortho Plus belongs to, and every claim starts with the retailer. You may have extra rights against the shop under the Consumer Rights Act 2015. Every trial here is the retailer’s, and an exchange, never a refund. Mattress Online gives 100 nights with one of its protectors, Mattressman 60 nights with a protector and a £50 fee, and Bensons a 40-night comfort exchange with charges. The Sleep Shop shows no trial on the Hawking, Turing or Blake.
Firmness, back pain and the orthopaedic claim
Sealy develops its Posturepedic springs with an International Orthopaedic Advisory Board of surgeons, engineers and medical scientists, and four of the eight models here are sold only as firm. Firmer is not automatically better for a bad back. In a randomised, double-blind trial of 313 adults with chronic low back pain published in The Lancet (Kovacs et al., 2003), people given medium-firm mattresses (5.6 on a scale from 1.0 for the firmest to 10.0 for the softest) had less pain and disability after 90 days than those on firm ones (2.3). The authors concluded that “A mattress of medium firmness improves pain and disability among patients with chronic non-specific low-back pain.”
A firmness label is not a measurement either, and retailers grade on their own scales, so Mattressman calls the Mellbreak Extra Firm and the Steeple Firmer. The tufted Mellbreak, Steeple and Grasmoor suit back and front sleepers who know they like a hard surface, and our firm and orthopaedic rankings include the Grasmoor.
Depth, weight and delivery
Sealy’s guarantee terms say its mattresses “should not be rolled or bent”, so they arrive flat, and allow a size tolerance of plus or minus 2cm. Weight decides how easy the regular head-to-toe rotation is, and Mattress Online gives 31kg for a double Blackwood, 42kg for a super king. Ideal Home’s reviewer reported that the delivery team could not get a Newton up her awkward staircase without bending it, which they were not insured to do. The terms also ask for slats 10cm wide with gaps of no more than 7.5cm, so an old frame can void the guarantee.
Price against typical spending, and allergy approval
In a National Bed Federation survey of 500 recent bed buyers in November 2021, 46% had spent up to £399 and three quarters less than £800. Of the eight doubles here, only the three Ortho Plus models came in under £800 in September 2026. Allergy UK gives its Seal of Approval to the Posturepedic Elevate and Elevate Ultra collections, whose ticking uses Sealy’s ProShield fibre. The Ortho Collection on that list is a Bensons for Beds range, not the Ortho Plus line, and the Newton is not named.
Which Sealy for which sleeper
The best mattresses of 2026 ranks the wider market, alongside Silentnight, Hypnos and TEMPUR. The three chains tie their trials to a protector, so see our best mattress protectors first.
Allergy UK Seal of Approval 
