A family of four transformable seats for Sofable by Mantellassi — Vòltia, Vòltia Pro, Rotonda and Rotonda Slim. The brief asked for an upholstered armchair for shared spaces; the answer pushes on technical materials, visible mechanisms and a versatility that makes each piece an icon for any space.
- 4Seats in one family: Vòltia, Vòltia Pro, Rotonda, Rotonda Slim
- 3Postures for every seat, from upright to reclined
- 3Hinges that transform Rotonda
- 2Technical materials: waffle fabric and stainless steel
- 3Colours: orange, fluo violet, aqua green
Brief
Sofable by Mantellassi asked for one of three products — a screen, a coffee table or an armchair — following precise guidelines consistent with the brand. The armchair had to be upholstered, with a discreet wood or metal base, suited to shared spaces, with a profile inspired by the new logo or an innovative removable cover.
The choice
An armchair and chaise longue that interprets the client's requests boldly: it pushes on innovative materials and finishes, and on a versatility able to transform it — making it an icon for any space.
Four seats, two families
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01
Vòltia
Transformable armchair and chaise longue in waffle fabric and stainless steel.
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02
Vòltia Pro
The evolution of Vòltia, with an adjustable headrest.
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03
Rotonda
A soft, sculptural armchair that opens up with three hinges.
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04
Rotonda Slim
The compact version: no armrests, pop colours.
It turns, like whoever sits on it
An elegant, contemporary name that recalls turning, movement and transformation — the gesture of changing position, just as the armchair does. A technical aesthetic meets a playful side, through generous volumes and visible rotations.
- TypeArmchair / chaise longue
- MaterialsWaffle fabric, stainless steel
- StrengthsModularity, technical materials
- SettingsHomes, hotel lounges, waiting areas
Rational design
Every dimension is studied to be efficient and to answer the brief as well as possible. Measurements in centimetres.
- As little as possibleThe way good design is
- Essential + functionalEvery element has a clear, necessary role
- MaterialsTechnical fabric and stainless steel
- StableSteady while in use
- Intuitive adjustmentDiscreet mechanism, evident function
- InspirationDieter Rams
“Nothing superfluous, everything is designed to last. Simplicity is not subtraction, it is precision.”
Three postures, one seat
- 01
Seated
An active, upright posture, ideal for concentration and conversation.
- 02
Reclined
For total relaxation and physical recovery.
- 03
Semi-reclined
Comfort and attention together: a pause without losing presence.
A headrest borrowed from the car
The natural evolution of Vòltia: the same distinctive look and high-quality technical materials, with more function for an even more complete comfort. Vòltia Pro adds an adjustable headrest with a mechanism inspired by car seats — intuitive, robust and made to adapt to different postures and heights.
- HeadrestCylindrical, adjustable
- MechanismInspired by car seats
- FitDifferent postures and heights
Equally at home in a living room or a hotel lounge
It fits naturally into homes and public spaces — contemporary living rooms, hotel lounges, waiting areas, exhibition spaces — bringing together function and stage presence.
Soft outside, transformable inside
A playful, soft, modern armchair, almost sculptural, entirely upholstered in a rubberised technical material. The name recalls its rounded shape and the rotation of its parts: three hinges extend the footrest, headrest and armrests. A wink at Playmobil and Transformers, blending looks and surprise in a single gesture.
- TypeArmchair / lounge chair
- MaterialRubberised waffle fabric
- HingesFootrest, headrest, armrests
- ReferencesPlaymobil, Transformers
Modular design
Every dimension is studied to be efficient and to answer the brief as well as possible. Measurements in centimetres.
- TransformableEvery part adapts and changes easily
- Lasting materialInnovation and resistance without giving up comfort
- Effective minimalismA simple design, full of possibilities
- StableSteady while in use
- Pop inspirationPlayful shapes from pop culture
- Intuitive adjustmentHidden mechanism, evident function
Closed, open, semi‑open
- 01
Closed
The standard position, for a compact, informal seat.
- 02
Open
Fully extended, for maximum relaxation in a reclined posture.
- 03
Semi-open
Backrest tilted and armrests retracted: relaxed but active.
The feel of a motorcycle seat
Rotonda is covered in a rubbery technical fabric made for daily use and easy to look after. Waterproof and washable, it recalls the texture of motorcycle seats, for a futuristic, resistant look.
- FabricRubberised technical waffle
- CareWaterproof, washable
- StitchingVisible on every side, forming a piping
- PipingDeeper texture, better grip on the fabric
For spaces that dare
Designed for unconventional settings — creative spaces, showrooms, concept stores, contract interiors, homes with a pop, experimental taste. Not an armchair for everyone, but for those looking for a strong sign that defines a space.
Same soul, smaller size
The compact version of Rotonda keeps its iconic, playful shape but drops the extending armrests, becoming slimmer and suited to smaller rooms. The legs get shorter, the space gets bigger.
Pop colours
Because colour can be a form of design too.
- Fluo violet#7264EF
- Aqua green#A9E7D8
- Orange#FF5A1F
