In terms of flexibility, many say the Knoll ReGeneration is king — one of the most comfortable, most giving office chairs you can sit on. Our hands-on review, re-verified for 2026, tests those claims and answers the question that’s changed since we first wrote it: with Knoll now part of MillerKnoll and the chair gone from Amazon’s shelves, where do you actually buy one?
About the brand — Knoll
Knoll is a premium brand that pairs modern design with high-tech engineering, and quality-wise it plays in the same league as Steelcase and Herman Miller — its two most famous chairs are routinely compared with the iconic Herman Miller Aeron. The 2026 wrinkle: Knoll and Herman Miller now live under the same roof as MillerKnoll, which makes the comparison a family affair — and consolidates where you shop for either name.
ReGeneration Desk Chair by Knoll Review
Comfort — Seat
The seat wears a cushioned pad that’s thinner than you’d hope a cushioned chair would be — firm on the buttocks, in the deliberate way. The thin cushion holds up well: no frame poking through, no bottoming out. If you like firm support, you’ll call it comfortable; if you want cradling plushness, you won’t. Note the cushion’s shape, too — nearly flat rather than contoured, which is intentional: a straight seat lets you sit sideways, and sideways sitting is this chair’s whole philosophy, as you’re about to see.
Back and lumbar support
The backrest is built from an ultra-flexible high-performance material the brand engineered for exactly this trick: grab the S-curved back and bend it by hand and it gives without complaint, then springs home. It feels thin and is surprisingly supportive, the netting design ventilates well enough to retire sweat as a concern, and a thin bar at the back slides up and down to tune the lumbar support.
The headline feature is the 270-degree “sit flex” design: sit sideways, drape a leg, twist to talk to a colleague — the back flexes with you and keeps supporting whatever direction you’re facing. For fidgeters and position-changers, that liberty with no end-of-day back pain is the entire pitch, and it delivers.
Armrests
The standard armrests adjust up and down, and that’s where the praise ends: hard plastic, a bit short, slightly slippery, rigid on the skin. A little padding would have transformed them. They’re the one part of the chair that feels beneath its price — the 4-way adjustable upgrade (more below) is worth budgeting for.
Shipping and assembly
One big, heavy box with side handles — recruit help for the carry — and then the easiest assembly in the premium class: the chair arrives essentially pre-built, and you connect three parts (legs, seat, barrel) in under five minutes, no manual required. Slide the seat onto the barrel, barrel onto the legs, done. Carrying the box in takes longer than building the chair.
Customization and adjustable features
Knoll’s configurator offers 4-way adjustable armrests, an aluminum base, and upgraded casters. It’s a shorter options list than Steelcase or Herman Miller offer, but the essentials are here.
Adjustable features
Armrests aside, the adjustability satisfies. Seat height spans six-footers down to petite users — if your current chair leaves your feet dangling, this one won’t — and the recline has a lovely elastic bounce you can also lock in place. Best of all is the adjustable seat depth, a feature you rarely see, which is what genuinely fits this chair to both taller and shorter bodies rather than merely tolerating them.
Build, structure, and warranty
Stable, sturdy, and manifestly well made — fidget all you like, nothing shakes. Seated comfort lands remarkably close to an Aeron, with a few exceptions we cover throughout. The warranty runs 10–12 years, matching Herman Miller and Steelcase, and warranties that long are the brand betting real money on its own build quality.
Aesthetics
Simple and modern, with visual echoes of the Aeron and the Sayl, while the S-shaped backbone recalls the Mirra. Both Knoll and Herman Miller sit at the top of the flexibility game; the Knoll reads as the more giving, more elastic of the schools.
Knoll Generation vs ReGeneration office chair
Four differences decide it. The ReGeneration is the lighter, more compact sibling, so the Generation better fits those wider around the waist. The Generation costs more. The Generation’s upper back is even more flexible — recline extremely, slouch into it as a headrest, or drape an arm over it when sitting sideways. And the adjustable features nearly match, except the Generation lacks adjustable lumbar support.
So: need customized back support, choose the ReGeneration and its adjustable lumbar. Want maximum flex and more seat space — the more fun way to sit — the Generation earns its premium. Comfort-wise the two feel almost the same; it’s personal preference wearing two price tags.
Summary
- Extraordinarily flexible — move, twist, sit sideways, slouch, and stay supported. The finicky and the sloucher will love it most.
- It’s 44 percent recycled plastic — 46 with the aluminum base. A genuinely greener option.
- The adjustable lumbar and the rare adjustable seat depth are the standout features, fitting short and tall bodies alike.
- The chair runs small — larger-waisted sitters should size up to the Generation.
- The standard armrests are the weak spot: thin, hard plastic, and short for tall users.
- The 4-way adjustable arms upgrade fixes most of that, at added cost.
Who will benefit from the chair the most
You’ll love it if you want an ultra-flexible, firm chair that moves with you — a variety of sitting positions with no back pain at day’s end, and extra support for chronic slouchers. The caveats concern the tall: above six feet, the armrests run short and the mid-height back won’t cover your full spine — very tall users should audition before committing.
Final say — and where to buy it in 2026
The ReGeneration remains one of the most flexible office chairs we’ve ever tested — flexibility born of skillful engineering, not flimsy material — and a greener buy than nearly anything in its class. It fits the modern-office checklist; be ready to shell out for it.
The buying route has changed since our first review: the open-box Amazon.ca listing we once pointed to is gone, and the ReGeneration has essentially left Amazon in both countries. Buy it today direct from Knoll or through MillerKnoll’s dealer network (Canadian buyers included) — the configurator there unlocks the armrest and base upgrades anyway, which is how this chair deserves to be ordered. If the premium tier has you comparison shopping, our long-hours chair guide lines the ReGeneration’s rivals up side by side.
Last updated: August 30, 2026 — full 2026 refresh: hands-on review intact, buying route updated for the MillerKnoll era.
