ProtoArc EC200 Ergonomic Office Chair, Adjustable Seat Depth

ProtoArc EC200 Ergonomic Office Chair

Seat depth is the adjustment most chairs leave out, and the one that matters most if you're tall. The EC200 offers five settings from 33 to 43 cm, so you can slide the seat to match your leg length rather than perching on the edge or feeling the front rail behind your knees. Underneath, a three-layer cushion pairs breathable mesh with a 55D high-resilience foam core that's tested to hold its shape after three years of eight-hour days. Lumbar support adjusts 6 cm vertically and 2 cm in depth, and the backrest locks at four angles.

Why you'll love it

• 5-level seat depth adjustment, 33-43 cm
• 3-layer cushion with 55D high-resilience foam core
• 2-way lumbar: 6 cm vertical, 2 cm depth
• 4 lockable recline positions: 90°, 105°, 120°, 130°
• 3D headrest — height, depth and dual-axis rotation
• Widened armrests with 7 cm of adjustment
• Assembles in around 20 minutes with tools included
• 5-year warranty with free replacement parts

Specification

• Brand: ProtoArc
• Model: EC200
• Seat depth: 33-43 cm, 5 levels
• Suits heights: approx. 163-185 cm
• Cushion: 3-layer, 55D high-resilience foam
• Lumbar: 6 cm vertical, 2 cm depth adjustment
• Recline: 4 lockable positions with tension knob
• Headrest: 3D adjustable
• Armrests: widened, 7 cm adjustment
• Gas lift: TÜV Rheinland Class 4 certified (EN 16955)
• Standards: BS EN 1335, SGS tested to ANSI/BIFMA X5.1
• Warranty: 5 years
• Colour: Black

Seat depth, properly adjustable

Slide the seat forward or back across five settings. Get this right and knee pressure disappears — it's the single biggest comfort gain for anyone over about 180 cm.

A cushion built to last

Breathable mesh over a 55D foam core over a reinforced base. Ordinary foam flattens within a year; this structure is tested to hold shape through three years of daily use.

Four angles, all lockable

90° for work, 105° for reading, 120° for calls, 130° for stepping back. The tension knob sets how much effort it takes to move between them.

Good to know

The seat depth range is designed around users roughly 163-185 cm tall — outside that, check the measurements against your own before ordering. Assembly takes about 20 minutes and everything needed is in the box.

In the box

• ProtoArc EC200 chair
• 3D headrest and armrests
• Five-star base and castors
• Assembly tools and instructions