COLAMY Ergonomic Office Chair with Sliding Seat, High Back Mesh Desk Chair, 4D Armrests, Adjustable Lumbar Support and Headrest, Tilt Lock, Home Office Chair – Black

Price: null - $289.99
(as of Nov 03, 2026 03:48:33 UTC – Details)

This chair starts with the numbers, because the numbers decide whether it fits you. The seat cushion on this ergonomic office chair measures 3.54 inches thick and 20.47 inches wide. Seat height adjusts from 16.73 to 21.06 inches. The sliding seat changes seat depth from 15.75 to 17.72 inches. Overall, the chair spans 27.76 inches deep, 28.94 inches wide and 44.29 to 51.38 inches tall. Every point where the chair touches you adjusts. The 4D armrests move in height, forward and back, side to side, and rotate. Lumbar support travels up and down a track on the back frame so it lines up with your lower back, and the ratchet headrest lifts and tilts to suit your neck. The backrest reclines and locks at the angle you set, and a tension dial lets you match the recline to your own weight. The sliding seat is the feature most chairs at this price skip. If a seat runs too deep, you slump forward; too shallow and your thighs lose support. Turning the knob on the left side of the seat moves the cushion along its track, so the front edge stops pressing into the backs of your knees and your back stays against the backrest. Under the cushion, structure you can check. The chair is tested to ANSI/BIFMA X5.1 general-purpose office chair standards, including a 136 kg seat impact, 120,000 swivel cycles and 300,000 recline cycles. Rated capacity is 300 lbs, carried by an aluminum alloy five-star base on smooth-rolling casters. It assembles in six steps, and the Allen key is in the box. The back is high-elasticity Korean mesh that breathes through long sessions and follows the line of your spine; the seat is molded foam, so you get airflow where your back rests and support where you sit. Set it up in a home office, a study or a shared corner of the living room – this is a desk chair built to be measured, adjusted and kept.
EVERY NUMBER ON THE TABLE–Seat cushion: 3.54 inches thick, 20.47 inches wide. Seat height adjusts from 16.73 to 21.06 inches, seat depth slides 15.75 to 17.72 inches. Overall: 27.76 inches deep, 28.94 inches wide, 44.29 to 51.38 inches tall.
SLIDING SEAT DEPTH, SET TO YOUR LEGS–A knob on the left side of the seat moves the cushion forward and back, matching thigh support to leg length and keeping the seat edge from pressing into the backs of your knees. Depth range: 15.75 to 17.72 inches.
4D ARMS, LUMBAR ON A TRACK, RATCHET HEADREST–Armrests adjust in height, slide forward and back, pivot side to side and rotate. Lumbar support rides up and down its track, the headrest lifts and tilts on a ratchet, and the backrest locks at the angle you choose, with a tension dial to match the recline to your size.
TESTED TO BIFMA, BUILT ON ALUMINUM–The chair passes ANSI/BIFMA X5.1 office chair testing: 136 kg seat impact, 120,000 swivel cycles and 300,000 recline cycles. Under the seat, an aluminum alloy five-star base and smooth casters carry up to 300 lbs.
BREATHABLE KOREAN MESH BACK–High-elasticity mesh moves air across your back and follows the line of your spine. The molded foam cushion keeps full workdays comfortable, and it assembles in six steps with the Allen key included, ready for a home office, a study or a shared workspace.
Customers find the office chair comfortable, with one mentioning they can sit for 4+ hours without issues, and appreciate its easy assembly with clear instructions. The chair receives positive feedback for its quality and sturdy construction, though some report it tearing with regular use. The lumbar support and adjustability receive mixed reviews – while some find the adjustments great, others criticize the ratcheting system, and durability opinions vary between those who say it holds up well and those who report it breaking down within months. Value for money is also mixed, with some finding it better than expected for the price while others say it’s not worth the cost.

Prices and availability are accurate as of November 3, 2026. Products may have different prices on Amazon.