An ultra firm mattress transformed my sleep — 3 I recommend this Black Friday

1. Plank Firm mattress: twin from $749 now $524.30 at Plank
The Plank Firm more than lives up to its name, with an Extra Firm feel that has almost no give. But this is a double-sided mattress, so flip it over for a touch more cushioning. This Firm side probably has the wider appeal – as we discovered in our Plank Firm mattress hands-on, it better suits side sleepers – but for sturdy support all across the body, the Extra Firm Plank is hard to beat. There's 30% off right now and this saving only occurs around the major holidays. At $932.40 (was $1,332) for a queen, it's a good price for a specialist mattress. And you'll get a 120-night trial and a 10-year warranty.

2. Siena Memory Foam Mattress: twin from $529 now $189 at Siena
The Siena isn't quite as firm as the Plank, but let's be honest; what is? However, in our Siena Memory Foam Mattress review we found this bed much firmer than the 'medium-firm' Siena claims, with a dense core that only lightly contours to the body. The Siena is, from our experience, the best cheap mattress, as well as one of our favorite memory foam mattresses. It's always on sale but for Black Friday, Siena has increased the deal. A queen is now $379, reduced from its usual sale price of $399 (and its "total value" of $769). It also comes with a 180-night trial and a 10-year warranty.

3. Titan Plus mattress: twin from $699 now $489.30 at Titan
The best mattresses for heavy people tend to be on the firm side, but the Titan Plus takes that to a whole new level. Rated nine out of 10 on the firmness scale, those with a bigger build should be able to lie on this mattress without feeling like they're sinking all the way through the foam. There's 30% off for Black Friday, a boost from the usual 25% off sale, and a queen is now $874.30 (was $1,240). That's a competitive price for a mattress that supports up to 1,000lbs. Benefits include 10-year warranty, 120-night sleep trial, and free shipping.