Designed by Niels Diffrient. Made by Humanscale.

Featuring a unique linear design, the Diffrient Smart chair is ideal for any high design environment. Created with Humanscale’s revolutionary Form-Sensing Mesh Technology, Diffrient Smart’s tri-panel backrest fits like a perfectly tailored shirt to provide exceptional lumbar support. Using Humanscale’s weight-sensitive, self-locking recline mechanism, Diffrient Smart automatically adjust to each sitter and provides perfect support to any posture. Diffrient Smart is also available in Diffrient Smart Plus with a wider seat and additional support.


  • Innovative weight-sensitive, self-locking recline mechanism with 20 degrees of movement uses each sitter’s body weight to perfectly adjust the tension and recline of the chair
  • Automatically pivoting backrest with seven-degree back tilt offers perfect lumbar comfort in all positions
  • Unique arm design attaches to the back frame to provide support during full range of recline
  • Tri-Panel non-stretch Mesh Technology provides perfectly tailored comfort and lumbar support for any posture
  • Modular design ensures easy maintenance and allows the user to update the chair’s aesthetic
  • Contoured seat cushions that closely follow the body’s shape and finished with a waterfall edge to offer long-term comfort,reduce pressure points and provide weight distribution
  • A variety of high-performance textiles and proprietary meshes complement the chair’s form

Diffrient Smart Plus: wider seat and additional support – only available with 4D arms & aluminium base
Arms optional: fixed, height adjustable duron arms, 4D adjustable arms in duron
Plastic base (Smart)
Aluminium base (Smart and Smart Plus)
Cylinder: Low, tall, high with footring with return to height


26.5” W x 40-44.80” H (67.31cm W x 101.6 – 113.79cm H
Supports user height range of 5’.0” – 6’4” (152.4 cm – 182.88cm)
Supports user weight range of 100 lbs – 300 lbs (45.36kg – 136.08 kg)
Seat cushion: 19.25” (48.90cm) wide and 2“ (5.08cm) thick
Seat depth Adjustment range: 16.25” – 18.75” (41.27cm -47.63cm)
Unit weight: 31 lbs (14.061kg) without arms; 34 lbs (15.42kg) with arms


Black with black plastic trim
Gray with brushed recyclable aluminium trim
Black with brushed recyclable aluminium trim
Technogel cushions


15 year warranty
GREENGUARD Indoor Air Quality
GREENGUARD Gold and Level 2 certified
Member U.S. Green Building Council

Design square – Watson Commercial

For more details on this product please contact us: