Ergo VIRTONE™ - Perfection in detail.

The ergonomic Ergo Virtone chair fully meets the requirements and complies with the Regulation of the Minister of Family and Social Policy of 18 October
2023 amending the regulation on occupational safety and health at
workstations equipped with display screen monitors.

The Ergo Virtone swivel chair is equipped with a gas spring and a backrest connected to the seat by means of a synchronous mechanism. In
combination with the possibility of adjusting the height of the seat and backrest, the angle
of inclination of the backrest, and a suitably contoured seat and backrest,
it ensures full adaptation of seating conditions to the individual needs
of the user.

Additionally, adjustable armrests, headrest and lumbar support
and the mechanisms used allow for dynamic and ergonomic sitting, as
well as adopting a reclined, comfortable and ergonomic body position,
conducive to relaxation and maintaining proper posture.

The ergonomic Ergo Virtone chair meets the following standards and has a Certificate of Conformity for them:
PN-EN 1022:2024-04
PN-EN 1335-1+A1:2023-04
PN-EN 1335-2:2019-03

The chair has a load capacity for users weighing up to 110 kg.

The headrest is 320 mm wide and 165 mm high, with adjustable height and tilt angle. The headrest is equipped with 12 detents, allowing for a height adjustment range of 110 mm. The tilt angle is adjustable within a range of 78°.

The large surface of the headrest, made of flexible, durable, and resistant mesh, mounted on a frame of polypropylene reinforced with 30% fiberglass, provides multi-dimensional and comfortable head support, ensuring the highest level of user comfort.

The adjustable height and angle of the headrest allow for perfect customization of support to the user's height and the natural curve of the cervical spine. Proper positioning reduces tension in the neck and shoulders, which is crucial during long hours of computer work.

The backrest is made of elastic, durable, and resistant mesh, mounted on a frame made of polypropylene with 30% fiberglass, ensuring stability and even distribution of load. The back of the backrest is mounted on a durable structure made of polypropylene with 30% fiberglass, with two arms extending downwards, connecting under the seat to the mechanism and armrest components. The screws securing the backrest to the height adjustment and lumbar section are covered by an aesthetic plastic trim.

The Ergo Virtone chair's backrest is 510 mm wide and 570 mm high. The backrest has a contoured lumbar section, with additional support provided by a perforated overlay made of polypropylene with 30% fiberglass, located behind the mesh. Its height is adjustable by means of 6 detents within a range of 40 mm. The overlay also has a depth adjustment for lumbar support, using a knob, within a range of 20 mm, thereby supporting the natural curvature of the lower spine. The ability to adjust its height and depth helps prevent back pain and strain resulting from prolonged sitting.

The backrest tilt angle is adjustable from 90° to 140° and can be locked in 4 positions.

The tilt adjustment allows for changing position during work, which improves circulation and reduces muscle fatigue. The adjustable lumbar support supports the natural curvature of the lower spine. The ability to adjust its height helps prevent back pain and strain resulting from prolonged sitting.

The ergonomically profiled seat is made of high-quality cast polyurethane foam (polyurethane foaming technology in molds) with a density of 55 kg/m³ and a thickness of 69 mm, covered with durable and resistant upholstery. The high-temperature foam molding process and the use of flexible material guarantee a uniform structure without voids, which translates into high durability and resistance to deformation. The foam does not require the use of glue or formaldehyde, making it safe for health and environmentally friendly. The underside of the seat is a cover made of polypropylene with 25% fiberglass, with a thickness of 3.1 mm, making it resistant to deformation.

The seat has a rounded front edge to reduce pressure on the thigh muscles and prevent numbness in the lower limbs when maintaining a forward-leaning body position (e.g., when writing by hand).

The seat width is 510 mm, with armrests 700 mm, and the depth is 510 mm. The seat height adjustment in the range of 500-600 mm is carried out using a handle located just under the seat on the right side of the person sitting. This adjustment allows the feet to be placed stably on the floor, while maintaining an angle of approximately 90° at the knees. This is the basis of an ergonomic position that supports proper circulation and reduces strain on the lower back. It also prevents nerve compression, muscle tension, and numbness in the legs and buttocks.

The seat also adjusts in depth by 45 mm using a handle located under the seat on the left side of the seated person, which allows for easy and ergonomic adjustment of the chair to the user. This adjustment allows the chair to be adapted to the user's thigh length. The appropriate distance between the edge of the seat and the knees prevents compression of blood vessels and improves sitting comfort. The seat combines excellent functionality with an ergonomic form, ensuring high sitting comfort even during long periods of work.

The handle located to the user's left is used to adjust the backrest tilt, allowing the function to be adjusted comfortably and ergonomically, without needing to lean forward. The synchronous mechanism has 4 locking levels with backrest tilt adjustment ranging from 90° to 140°. The synchronous mechanism allows for simultaneous tilting of the backrest and seat in appropriate proportions. This keeps the body in an ergonomic position even when changing positions, increasing comfort and relieving strain on the spine.

The tilt angle lock allows the backrest to be held in the desired position. This is particularly important during tasks requiring concentration, where a stable body position increases the precision of tasks performed. Proper adjustment improves body weight distribution, increases comfort, and supports ergonomic pelvic alignment.

The elongated ergonomic knob located under the seat on the right side is used to adjust the backrest tilt tension, which is adapted to the user's weight. This is an extremely important adjustment, as setting the backrest tilt tension too high for light users (approx. 45 kg) causes leg muscle tension and nerve compression leading to pain. On the other hand, heavier users (approx. 90-120 kg) need stronger tilt tension, as setting it too low will cause an unexpected maximum backward tilt and excessive tension in the front part of the legs. The resistance force adjustment allows the pressure needed to tilt the backrest to be matched to the user's weight and preferences. This ensures smooth and controlled movement, and the backrest provides stable support without the effect of a sudden tilt for heavier individuals or excessive resistance for lighter individuals.

The anti-shock mechanism protects the user from a sudden return of the backrest after unlocking. This prevents the backrest from hitting the back, and the change of position is smooth and safe, increasing comfort and caring for the spine. To unlock the mechanism again and set the backrest in the desired position, lean against the backrest and gently push it backward – this allows you to adjust the tilt angle to your needs again.

The chair has 3D adjustable armrests with a soft surface made of polyamide with 30% fiberglass and polyurethane. The armpad length is 260 mm, and the width is 110 mm, tapering to 90 mm at the back. The armrests adjust in the following planes:

- Up-down adjustment in 5 positions within a 70 mm range

- Front-back adjustment in 4 positions within a 45 mm range

- Left-right angle adjustment of the armpad within a 24° range.

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The multi-dimensional adjustment of the armrests allows for proper forearm positioning and shoulder relief. Correct adjustment reduces neck tension and the risk of wrist discomfort.

The chair's gas lift is a class 4 lift with a 100 mm stroke. It is made of a steel casing that can withstand an even load of up to 200 kg, ensuring stability, and the internal core of the lift is filled with compressed nitrogen with a purity of 99.7%, which guarantees smooth and precise seat height adjustment while maintaining maximum safety of use.

The total height adjustment of the chair, including seat, backrest, and headrest height adjustments, ranges from 1150-1370 mm.

The chair base is made of durable polished aluminum alloy, class 350#. The base can withstand a maximum static load of up to 1136 kg. The base itself has a diameter of 640 mm, and with the casters, a diameter of 700 mm. Five 60 mm diameter casters are attached to the base.

The ability to freely rotate 360° increases mobility at the workstation and reduces the need for torso twisting. This lowers the risk of spinal overload and improves the ergonomics of daily movements.

The armchair has 5 nylon castors with a diameter of 60 mm with silent 360° rotation. This type of castor reduces wear on surfaces such as parquet and laminate flooring.

Both the mesh and the fabric are designed for use in office buildings and public facilities with high resistance to abrasion, light and fire.