Allsteel Sum Office Chair

See our Allsteel collection here: seatingmind.com/allsteel-sum-office-chair/

No adjustments required.


What if all you had to do was sit? And without touching a knob or lever, your chair provided ideal ergonomic positioning by adapting itself to your weight, size, and working position? Introducing Sum. A chair that’s more than just comfortable, but automatically creates a perfect seating fit and posture for 90% of human shapes and sizes. Sum is made with several proprietary design features that provide completely customized, totally foolproof support for anyone who sits down. And all without training, tuning, or trying to find controls and figure out which does what.

A total seating solution.


Sum is a complete family of chairs that brings Allsteel’s unique set of integrated technologies to all parts of your office. Available in four different models, with a 24-hour rating on stools as well as task and conference chairs, Sum is an inspired choice for offices, conference rooms, high-churn areas, or wherever work gets done over many hours of the
day. And sometimes through the night.

We’ve got your back.


With Sum, there’s no guessing about the best position for lumbar ergonomics. It just happens. Sum’s proprietary AutoFit design uses air displacement to find exactly where each back needs the most support, and then provides
a customized fit.

As you move, Sum’s conforming back adjusts top-to-bottom and side-to-side to ensure balanced pressure distribution in all seated positions, even the most relaxing recline. The result is lasting comfort throughout the workday. A layer of impermeable Saranex™ film surrounds AutoFit for lasting durability.

All you have to do is sit.


Let Sum take care of the rest. Avatar 2 allows each person to find their most comfortable, most natural seated position. Sitting up or reclining. Scribbling or thinking. Reading or typing. Sum’s weight-activated ergonomics will keep everyone perfectly balanced and positioned for work. Which means one less thing to get in the way of productivity.

Sum stays with you.


Sum’s seat and back respond simultaneously as you move along the full range of recline to active tasking. Lean back, and our Avatar 2 technology keeps your seat level as it lifts so you stay perfectly balanced. Reach for your desk, and Avatar 2 follows your every move. It all adds up to effortless, customized ergonomic positioning and exceptional comfort.

Keep your eye on the ball.


We call it work targeting. Whether you’re sitting up, leaning forward, or reclining, Avatar 2 synchronized motion keeps your head aligned so the task at hand is always in the optimal line of sight. Which, in turn, reduces eyestrain, neck fatigue, and distractions. So you’ll be more focused and productive, no matter how many different jobs you’re juggling, no matter how many hours a day you’re working.

Sum allows workers to continually maintain their line of sight to stay focused and productive, and to keep work comfortably within reach.

A few refinements.


There are some adjustments Sum can’t make on its own. So we made sure it’s easy for you to make them yourself with controls that are simple to access and work effortlessly. Sum is made to adapt not only to different body sizes, but to a full range of work tasks and styles.

Conference room comfort.


Now, no matter who pulls up a chair, they’ll be comfortable. For conference rooms and teaming areas, Sum comes with the same exceptional, automatic, ergonomic technologies as its task counterpart. Whether they’re meeting, conferring, strategizing, planning, crunching numbers, or staring at the ceiling waiting for inspiration to strike, anyone’s body will be balanced. And a body at rest lets ideas be in motion.

  1. Technology-driven performance and ergonomics.
  2. Style in a graceful profile.
  3. Models for every part of the office.


It all adds up with Sum.

Taken from: www.allsteeloffice.com/synergydocuments/sumbrochure.pdf