One of the questions we get asked most often at Precision Ergonomics is: "Which Salli model is right for me?" The Twin, the MultiAdjuster and the SwingFit all look similar from the outside — same iconic seat shape, same base, same Salli quality. But the differences between them are significant, and choosing the wrong one means you won't get the full benefit of saddle sitting.
This guide breaks down each model honestly, with a clear recommendation for who each one suits best.
What all three models share
Before the differences, it's worth noting what every Salli stool in the core range has in common. All three feature Salli's patented split seat — the two-part design that eliminates perineal pressure entirely. This is what separates Salli from every other saddle stool brand, and it's the reason Salli stools are so widely used in dental and clinical settings across Europe.
All three also have the same gas stem, base and caster options, and are available in the same wide range of upholstery colours and materials.
Salli Twin — the classic, reliable entry point
The Twin is the original Salli model. It has a single height adjustment lever and a fixed seat width. That's it. There's a deliberate simplicity to it — no tilt mechanism, no swing mechanism, no width adjustment. What you get is the pure saddle-sitting experience with Salli's patented split seat, at the most accessible price point in the range.
The Twin suits you if: you're new to saddle stools, you want a shared chair that multiple practitioners can adjust quickly, you prefer a fixed and stable seat, or you're equipping a full practice on a budget. From £599.
If you've never used a saddle stool before, the Twin is the safest starting point. It's simple, effective and lets you experience the core benefit of saddle sitting without any additional complexity.
Salli MultiAdjuster — for those who need a precision fit
The MultiAdjuster adds two significant features to the Twin: an adjustable split seat width and angle, and a lever-based forward tilt mechanism. These additions make it a fundamentally different experience. The ability to independently adjust each seat half allows you to fine-tune exactly where the seat supports your sitting bones — something that makes an enormous difference, particularly for female practitioners with a narrower or wider pelvis.
The forward tilt is equally important. By tilting the seat slightly forward, the pelvis rotates into its natural neutral position, which maintains the spine's S-curve without any effort. This is why the MultiAdjuster is specifically recommended for practitioners suffering from acute or chronic back pain — the combination of tilt and seat width adjustment gives the greatest flexibility to find a truly pain-free sitting position.
The MultiAdjuster suits you if: you suffer from back pain, you're female and want a more tailored seat fit, you've tried saddle stools before and found them uncomfortable, or you work long procedures and need the most precise setup. From £653.
Salli SwingFit — for active sitting with adjustable width
The SwingFit replaces the tilt mechanism with something entirely different: a precision engineered spring embedded into the seat mechanism. This spring allows the seat to tilt gently in every direction — responding to your body weight as you shift during work. The seat moves less than 5 degrees in each direction, which is carefully calibrated to provide movement without instability. You can still perform precise dental work while sitting on it.
The SwingFit also retains the adjustable seat width from the MultiAdjuster — so you get both active movement and a customisable seat position. It has historically been the most popular model with female dental professionals, particularly those who don't have a history of back pain but want to build core strength and avoid fatigue during long sessions.
The SwingFit suits you if: you want gentle movement throughout the day, you work through long procedures and find static sitting tiring, you're under 5ft 6 (consider the SwingFit Small), or you want the most popular and versatile Salli model. From £695.
Quick comparison
In plain terms: Twin = simple, stable, affordable. MultiAdjuster = most adjustable, best for back pain. SwingFit = active movement, most popular overall.
If you're still unsure, the best approach is to trial the one you're most drawn to and contact us for advice. We know these stools inside out and can recommend the right model based on your height, working style and any specific discomfort you're experiencing.
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