4u

The flowing sleek lines of this chair by S.I. Design adds to the ambiance of sophistication in any environment while also providing incredible ergonomics, comfort and functionality. 4u’s range of backs include mesh, upholstered or welded fabric “groove”, which is a slim, comfortable hybrid of mesh and fabric. White and black frames are available with matching arms and bases. 4u offers two seat options: the euro slim line sit and the enhanced comfort sit. Also available as task stools.

 

See also the 4-UP series.

SPEC IT & QUOTE
4u groove back enhanced comfort seat private office chair.
Application: 4u groove back enhanced comfort seat private office chair.
4u mesh back slim line seat work chairs in a medium sized office. (Photo: Rightsize Facility)
Application: 4u mesh back slim line seat work chairs in a medium sized office. (Photo: Rightsize Facility)
4u mesh back slim line seat private office chair.
Application: 4u mesh back slim line seat private office chair.
4u mesh back slim line seat home office chair.
Application: 4u mesh back slim line seat home office chair.

Options & Colors

Click the + signs or words below to see details on each option including frame colors & mesh.

Framework
Back Styles
Mesh

Mesh

Groove

Groove

Upholstered

Upholstered

Seat Styles

All 4u seats use Via Seating’s comfort foam. This is a proprietary blend of high-density, injection-molded, closed-cell, cold-cured comfort foam  so durable and lasting it is backed by Via Seating’s 12 year warranty. Unlike traditional stacked foam pieces, Via’s seats are contoured to maximize comfort and support where needed with a circulation supportive waterfall edge.

Enhanced comfort medium (B)

Enhanced comfort medium (B)

Enhanced comfort large (C)

Enhanced comfort large (C)

Adjustable Lumbar Options
Optional black adjustable lumbar support #LS4B

Optional black adjustable lumbar support #LS4B

Guide: watch | pdf

  • Vertical position adjustment
  • Available on mesh or groove backs
Optional white adjustable lumbar support #LS4W

Optional white adjustable lumbar support #LS4W

Guide: watch | pdf

  • Vertical position adjustment
  • Available on mesh or groove backs
Adjustable lumbar support integrated in upholstered backs

Adjustable lumbar support integrated in upholstered backs

Guide: watch | pdf

  • Lumbar depth adjustment
  • Available on mesh or groove backs
Upholstery Layouts
Single upholstery

Single upholstery

Two-tone upholstery #U2:

Two-tone upholstery #U2:

  • 1 textile for seat
  • 1 textile for back

Available on upholstered backs only

Arms
Adjustable Arms

Standard option is armless #0A.

Black signature 6-way arms #33A

Black signature 6-way arms #33A

Guide: watch | pdf

  • Height adjustment (up/down)
  • Armrest position (back/forth)
  • Armrest angle (in/out)
White signature 6-way arms #35A

White signature 6-way arms #35A

Guide: watch | pdf

  • Height adjustment (up/down)
  • Armrest position (back/forth)
  • Armrest angle (in/out)
Black roll back arms #39A

Black roll back arms #39A

Guide: watch | pdf

  • Height adjustment (up/down)
  • Roll back feature
Black adjustable arms with optional add-ons #51A

Black adjustable arms with optional add-ons #51A

Guide: watch | pdf

  • Height adjustment (up/down)
  • Optional armrest position (back/forth)
  • Optional armrest rotation (angle)
  • Optional armrest width (in/out)
White adjustable arms with optional add-ons #52A

White adjustable arms with optional add-ons #52A

Guide: watch | pdf

  • Height adjustment (up/down)
  • Optional armrest position (back/forth)
  • Optional armrest rotation (angle)
  • Optional armrest width (in/out)
Polished adjustable arms with optional add-ons #53A

Polished adjustable arms with optional add-ons #53A

Guide: watch | pdf

  • Height adjustment (up/down)
  • Optional armrest position (back/forth)
  • Optional armrest rotation (angle)
  • Optional armrest width (in/out)

Control Mechanisms
Body Balance Mechanisms
Auto-adjust body balance #74C

Auto-adjust body balance #74C

Guide: watch | pdf

  • Height adjustment (up/down)
  • Tilt limiter (4-position)
Auto-adjust body balance + seat depth adjustment #74C-12SS

Auto-adjust body balance + seat depth adjustment #74C-12SS

Guide: watch | pdf

  • Height adjustment (up/down)
  • Tilt limiter (4-position)
  • Seat depth adjustment
Synchro Mechanisms
Quick adjust synchro #67C

Quick adjust synchro #67C

Guide: watch | pdf

  • Height adjustment (up/down)
  • Tilt limiter (5-position)
  • Back tension
Quick adjust synchro + seat depth adjustment #67C-SS

Quick adjust synchro + seat depth adjustment #67C-SS

Guide: watch | pdf

  • Height adjustment (up/down)
  • Tilt limiter (5-position)
  • Back tension
  • Seat depth adjustment
Quick adjust synchro + seat depth adjustment + forward tilt #67C-SS-FT

Quick adjust synchro + seat depth adjustment + forward tilt #67C-SS-FT

Guide: watch | pdf

  • Height adjustment (up/down)
  • Tilt limiter (5-position)
  • Back tension
  • Seat depth adjustment
  • Forward tilt
Stool Mechanisms with Height Ranges
Tall stool using a body balance mechanism, black footring #35C-11DRB

Tall stool using a body balance mechanism, black footring #35C-11DRB

Control Guide: watch | pdf
Footrest Guide: watch

  • Height adjustment (up/down) – vertical range 7.5″
  • Tilt limiter (3-position)
  • Repositionable footrest
Tall stool using a body balance mechanism, chrome footring #35C-11DRC

Tall stool using a body balance mechanism, chrome footring #35C-11DRC

Control Guide: watch | pdf
Footrest Guide: watch

  • Height adjustment (up/down) – vertical range 7.5″
  • Tilt limiter (3-position)
  • Repositionable footrest
Extra-tall stool using a body balance mechanism, black footring #35C-11XDRB

Extra-tall stool using a body balance mechanism, black footring #35C-11XDRB

Control Guide: watch | pdf
Footrest Guide: watch

  • Height adjustment (up/down) – vertical range 10.25″
  • Tilt limiter (3-position)
  • Repositionable footrest
Extra-tall stool using a body balance mechanism, chrome footring #35C-11XDRC

Extra-tall stool using a body balance mechanism, chrome footring #35C-11XDRC

Control Guide: watch | pdf
Footrest Guide: watch

  • Height adjustment (up/down) – vertical range 10.25″
  • Tilt limiter (3-position)
  • Repositionable footrest

Bases
5-Star Swivel Base Options
Black 5-star base #18BB

Black 5-star base #18BB

White 5-star base #18WB

White 5-star base #18WB

Polished 5-star #18PB

Polished 5-star #18PB

Caster & Glide Options
Black carpet casters #16HP

Black carpet casters #16HP

Grey-black all floor casters #16SCG

Grey-black all floor casters #16SCG

Black glides #16GL

Black glides #16GL

Add a safety brake feature on all caster options that locks the caster when the user gets out of the chair #SL1.

Colors
Frame Colors
Matte black #B

Matte black #B

Order a sample: here

Matte white #W

Matte white #W

Order a sample: here

Standard Mesh Colors
Black mesh #01U

Black mesh #01U

Order a sample: here

Graphite mesh #03U

Graphite mesh #03U

Order a sample: here

Stardust mesh #02U

Stardust mesh #02U

Order a sample: here

Patented Copper-Infused Mesh Colors
Black copper mesh #11U

Black copper mesh #11U

Order a sample: here

Natural copper striped #13U

Natural copper striped #13U

Order a sample: here

Groove Colors
Black groove #01UG

Black groove #01UG

Order a sample: here

Dark grey groove #02UG

Dark grey groove #02UG

Order a sample: here

Light grey groove #03UG

Light grey groove #03UG

Order a sample: here

 

Note: Material images are representational. Lighting, paper type, monitor screen settings and other factors can alter the virtual appearance of any material sometimes significantly. To best compare a material to the setting it will be used in, please request a free sample by clicking any of the images above or by visiting promo.viaseating.com .

 

Last updated 06/12/24.

Sustainability

Responsibly Made

DfE Lead Design →

DfE Lead Design →

All Via Seating products follow the Design for the Environment (DfE) design approach . During this process, all components are screened to identify and assess the human and ecosystem health impacts of chemicals of concern. We screen all product components to the ANSI/BIFMA e3-2019 Annex B- List of Chemicals of Concern and the California Proposition 65 List.

Vigorous Testing →

Vigorous Testing →

Our products are annually assessed by a 3rd party team of chemists & globally-recognized ISO 17025 accredited lab. They are rigorously tested for conformance to ANSI/BIFMA e3 standard credits 7.6.1, 7.6.2 and/or credit 7.6.3 as well as conference to low-emitting materials. Prior to product launch, every product is continuously developed testing its functionality & durability within Via Seating’s ISO 17025:2017 accredited lab .

Environmental Impact →

Environmental Impact →

All Via Seating products are BIFMA LEVEL® certified. LEVEL® is an evaluation and certification system for environmentally-preferable and socially-responsible office furniture. 3rd party certification is achieved by conformance to a multi-attribute standard created by the Business and Institutional Furniture Manufacturer’s Association (BIFMA) that evaluates product impacts across categories including Materials, Energy, Human Health and Social Responsibility.

End of Life ↺

End of Life ↺

Via Seating provides accessible care guidelines that help maintain the quality of every product and easy-to-follow disassembly instructions when a product reaches the end of its life.

S.I. Design team.

S.I. Design

In 1996 Lorenzo founded S.I. Design with designers Mirco Pegoraro and Mauro Naletto. S.I. specializes in furniture design, particularly for offices and communal spaces. Today, their team of eight focuses on design and technical assistance in product development utilizing advanced modeling programs.

Meet the Designers