Sprout Firmus Single-Sided Firm Natural Mattress

The single-sided Firmus is the firmest mattress Sprout makes. On Sprout's official six-point comfort scale it sits at position six, a step firmer than the two-sided Firmus, built for sleepers who want maximum support and a bed that never needs flipping. It comes from the same Edmonton workshop as the rest of the line, the only mattress brand endorsed by the Canadian Chiropractic Association as of mid-2026.

Single-sided means the comfort layers are finished on one face, so care is a simple rotation a few times a year instead of a full flip. It also brings the entry price down: a queen is $3,264 against $4,883 for the two-sided build, the most affordable way into a Sprout mattress.

Like every Sprout, it is built in Canada from natural materials over pocket coils, and the line carries a 10-year warranty with a proper foundation underneath. Sprout's own slat box and full-flex foundations are built for exactly that job.

If you want the same firm feel with two flippable faces, the two-sided Firmus is the step up; if firm sounds like more than you need, the single-sided Durus is the medium-firm middle of the trio. Our guide to what chiropractors actually recommend covers how firmness and support relate. Come lie on the Sprout line at 441 1/2 West Street in Brantford, or call (519) 770-0001.