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Office Master Yes YS78 High Mesh Back Ergonomic Task Chair

Office Master Yes YS78 High Mesh Back Ergonomic Task Chair

Regular price $438.75
Regular price Sale price $438.75
Sale Sold out
Ships within 2-4 weeks

Customizations Total: $0.00

Perfectly suited for users of taller statures. 300 lb capacity.

Office Master Yes YS78 Multi-Function High-Back Mesh Back Ergonomic Task Chair is built for taller users and highlighted with a sleek design which includes an aluminum base in matte black. YS78 features an advanced multi-function control mechanism that includes 3-stage locking tilt, synchronous seat/back tilt, free-float rocking tilt, and seat depth adjustment (seat slider). Configured with a 24" high back, and a generous 20.5" w x 18-20" d contoured seat.

A proven standard in numerous clinical and administrative environments, the Office Master Yes is an affordable and beautiful ergonomic task chair with many options.  Featuring an ergonomic mesh back and sigh producing seat cushioning with a comfortable, mild saddle contour. Yes provides a full suite of mechanisms to achieve any level of adjustability desired. Yes we can, and here it is! Healthcare professionals have said Yes! to this Office Master model for its notable comfort and ergonomic options.

Optional equipment available includes a wide variety of Arms, Cylinder, Casters, Deluxe Mesh Knit Upholstery, and Memory Foam Seat. See below for more detailed information.

A wide variety of 5 fabric grades as well as leather available with 429 total color options. See link to Fabric and Color catalog below:


Chair Adjustments:

NOTE: The above video demonstrates general adjustment capabilities which may vary depending on the model of the chair. The actual functions & appearance of your chair may differ from the video & illustration shown above. For a list of actual capabilities, please see the Features & Benefits list below or call 877-374-6872 for kind assistance.

Features & Benefits:

  • Pneumatic lift
  • 3-stage locking tilt
  • Free float rocking tilt
  • Synchronous seat/back tilt
  • Black nylon base
  • Tension knob
  • Seat depth adjustment
  • Soft casters


  • Seat Height Range: 17.5" - 22.5"
  • Back Dimensions: 20" w x 24" h
  • Seat Dimensions: 20.5" w x 18" - 20" d
  • Overall Width: 27"
  • Overall Height: 41.5" - 49.5"
  • 12 year Limited Warranty 

Arm Options:




  • 5" Black (standard) - Seat height range: 17.5-22.5"
  • 4" Black - Seat height range: 16.5-20.5"
  • 5" Chrome - Seat height range: 17.5-22.5"
  • 5" Black Heavy Duty - Seat height range: 17.5-22.5"

TLC Seat (optional):

  • Sigh-producing , dual-density seat cushion featuring 2 different pieces of co-molded foam (comfort + support layers). 

    Seat Depth Adjustment (standard):

    • SLD - Seat depth adjuster, for that perfect fit of back and seat.

    Neighborhood Knit Mesh Upholstery (optional):

    • Deluxe knit mesh jacket.


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