The Sealy Elevate Blake Medium is a 31cm Posturepedic spring mattress with a quilted Euro top, for sleepers who want a true medium feel.
The Sealy Elevate Blake Medium is a 31cm Posturepedic spring mattress with a quilted Euro top and a medium feel, and at the time of writing (September 2026) a double costs £1,645 at The Sleep Shop’s regular price. It is the medium model in Sealy’s Elevate collection, the entry point to the Posturepedic range, and it suits back sleepers and couples who want a bed that is neither soft nor firm.
The Blake Medium specification on sealy.co.uk describes the layers below, from the Euro top down to the base of the spring unit. Sealy says every spring in the AlignSupport coil is twice tempered and that the mattress is built without glue, using TCPP-free foams.
| Layer | Specification | What it changes |
|---|---|---|
| Top | Quilted Euro top | Extra cushioning at the surface |
| Comfort foam | Sealy Foam with a ComfortCore zone in the centre third | More pressure relief under the hips and lower back |
| Transition foams | Sealy Medium Foam and Sealy Firm Foam | Firms up the feel between the top and the springs |
| Support | AlignSupport coil, twice tempered | Conforms to your shape first, then supports |
| Edge and base | UniCased edge with interlocking keys, BasePlank | Wider usable surface, less roll-off at the edge |
| Cover | SmarTex and ProShield | Moisture management and an anti-allergen treatment |
Sealy makes the Blake Medium in four UK sizes, all 31cm deep, and sells it only through retailers. The Sleep Shop lists all four, and in September 2026 its sale took 25% off every size.
| UK size | Dimensions (cm) | Regular price at The Sleep Shop |
|---|---|---|
| Single | 90 x 190 | £1,369 |
| Double | 135 x 190 | £1,645 |
| King | 150 x 200 | £1,829 |
| Super king | 180 x 200 | £2,379 |
In a double, the Blake costs less than the Elevate Ultra Hawking Medium at the same shop and more than the firm Elevate Blackwood at Mattress Online.
Sealy describes the Blake as “not too firm and not too soft”, and we rate it 5 out of 10 for firmness. That suits back sleepers, couples with different preferences and people with low-back pain. A randomised trial of 313 adults published in The Lancet (Kovacs et al., 2003) found that medium-firm mattresses reduced chronic low-back pain and disability more than firm ones after 90 days. Lighter side sleepers may want a softer top, and heavier front sleepers a firmer model such as the Blackwood.
Allergy UK gives its Seal of Approval to the Posturepedic Elevate collection, which includes the Blake, on the strength of its ProShield or Purotex ticking. Sealy guarantees Elevate mattresses for 7 years under its guarantee terms, with claims made through the retailer, and the same terms rule out rolling or bending the mattress, so it arrives flat. The Sleep Shop shows no sleep trial on the Blake, delivers free across the UK on orders over £300 and quoted a delivery window of one to three weeks when we checked. There is no gel or copper layer, so the Blake is not built as a cooling mattress.
| Brand | Sealy |
|---|---|
| Material | AlignSupport coil unit, twice tempered, with UniCased edge support and a BasePlank. Sealy Foam with a centre-third ComfortCore zone, Sealy Medium and Firm Foams, quilted Euro top. Cover with SmarTex moisture management and ProShield anti-allergen treatment. |
| Made in | United Kingdom |
| Firmness | Medium (5/10) |
| Height | 31 cm |
| Warranty | 7 years |
| Delivery | Delivered flat, never rolled |
| Available sizes | 90x190, 135x190, 150x200, 180x200 |
| Overall score | 7.5/10 |
| Certifications | Allergy UK Seal of Approval |
“The Blake Medium is the medium-feel way into Sealy Posturepedic springs, a 31cm build with a quilted top that suits most back sleepers and many couples. Buy it where a trial is offered, because Sealy runs none and The Sleep Shop shows none on this model.”
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