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.

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.

 

Note: Dimensions for each seat size are width x depth of the seat measured off the chair. See the Dimensions tab above for exact seat dimensions for each configuration.

Enhanced comfort medium (B)

Enhanced comfort medium (B)

20.5″ x 19.5″

Enhanced comfort large (C)

Enhanced comfort large (C)

22.0″ x 19.5″

Slim line medium (B)

Slim line medium (B)

19.5″ x 19.0″

Adjustable Lumbar Options
Optional black adjustable lumbar support

Optional black adjustable lumbar support

Guide: watch » | pdf »

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

Optional white adjustable lumbar support

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:

Two-tone upholstery:

  • 1 textile for seat
  • 1 textile for back

Available on upholstered backs only

Arms
Adjustable Arms
Black signature 6-way arms

Black signature 6-way arms

Guide: watch » | pdf »

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

White signature 6-way arms

Guide: watch » | pdf »

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

Black roll back arms

Guide: watch » | pdf »

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

Black adjustable arms with optional add-ons

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

White adjustable arms with optional add-ons

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

Polished adjustable arms with optional add-ons

Guide: watch » | pdf »

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

Standard armless

Black upright fixed arms

Black upright fixed arms

Control Mechanisms
Body Balance Mechanisms
Auto-adjust body balance

Auto-adjust body balance

Guide: watch » | pdf »

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

Auto-adjust body balance + seat depth adjustment

Guide: watch » | pdf »

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

Quick adjust synchro

Guide: watch » | pdf »

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

Quick adjust synchro + seat depth adjustment

Guide: watch » | pdf »

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

Quick adjust synchro + seat depth adjustment + forward tilt

Guide: watch » | pdf »

  • Height adjustment (up/down)
  • Tilt limiter (5-position)
  • Back tension
  • Seat depth adjustment
  • Forward tilt
Stool Mechanisms with Height Ranges
Sit-to-stand telescoping gaslift with a footrest

Sit-to-stand telescoping gaslift with a footrest

Control Guide: watch » | pdf »

  • Height adjustment (up/down) – vertical range 7.25″
  • Tilt limiter (3-position)
  • Repositionable footrest
Tall stool using a body balance mechanism

Tall stool using a body balance mechanism

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

Extra-tall stool using a body balance mechanism

Control Guide: watch » | pdf »
Footrest Guide: watch »

  • Height adjustment (up/down) – vertical range 7.5″
  • Tilt limiter (3-position)
  • Repositionable footrest

Bases
5-Star Swivel Base Options
Black 5-star base

Black 5-star base

White 5-star base

White 5-star base

Polished 5-star

Polished 5-star

Brushed 5-star

Brushed 5-star

Caster Options
Black carpet casters

Black carpet casters

Black carpet casters + safety brake

Black carpet casters + safety brake

Safety brake feature that locks the caster when the user gets out of the chair

Grey-black all floor casters

Grey-black all floor casters

Grey-black all floor casters + safety brake

Grey-black all floor casters + safety brake

Safety brake feature that locks the caster when the user gets out of the chair

Glide Options
Black glides

Black glides

Colors
Frame Colors
Matte black

Matte black

Matte white

Matte white

Standard Mesh Colors
Black mesh

Black mesh

Details: here »

Graphite mesh

Graphite mesh

Details: here »

Stardust mesh

Stardust mesh

Details: here »

Patented Copper-Infused Mesh Colors
Black copper mesh

Black copper mesh

Details: here »

Natural copper striped

Natural copper striped

Details: here »

Groove Colors
Black groove

Black groove

Details: here »

Dark grey groove

Dark grey groove

Details: here »

Light grey groove

Light grey groove

Details: here »

Taupe groove

Taupe groove

Details: here »

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