Oqonos Cherg 025 Ergonomic Office Chair with Height and Depth Adjustable Lumbar Support, 4D Armrests, Class 4 Gas Piston

The Cherg 025 brings together in a compact format the features that have the greatest impact on everyday comfort: the most complete lumbar support in the whole range, adjustable in both height and depth to suit any type of back; armrests adjustable in 4 directions (height, angle and depth) that follow every working posture; and a Class 4 gas piston with a nitrided inner core that doubles its hardness, ensuring long-term stability. The breathable mesh backrest keeps your back ventilated, and the high-density eco-friendly foam seat keeps its shape with use. The 60 mm silicone castors glide silently without damaging the floor. BIFMA and EN1335 certified, with REACH certification. Maximum capacity of 150 kg.

Backrest and seat:

• Breathable mesh backrest (polyester + nylon), formaldehyde-free, flame-retardant, REACH certified, resistant to over 100,000 cycles. Adjustable recline from 102 ° to 123 ° with position lock.

• High-density eco-friendly foam (55 kg/m³, 57 mm thick), moulded at high temperature with an ergonomic shape that adapts to the natural posture of the user. Non-deforming and glue-free. Breathable, crease-resistant elastic seat fabric, resistant to 100,000 cycles.

Ergonomics and adjustments:

• Lumbar support adjustable in height (30 mm) and depth (20 mm).

• 4D armrests: adjustable in height (70 mm), angle (50 °) and depth (45 mm). Padded 90 mm cushion.

• Reinforced steel synchronised mechanism (>3.1 mm). 1 locking position.

• Class 4 gas piston with 2.5 mm reinforced wall and a nitrided inner core that doubles its hardness to prevent long-term wobble.

Structure and durability:

• Reinforced nylon base of 340 mm with certified static load of 1,136 kg (BIFMA standard).

• Dual silicone 60 mm castors, quiet and suitable for all types of flooring.

• Maximum capacity: 150 kg.

Dimensions:

• Seat height: 395-495 mm

Width: 510 mm

Depth: 480 mm

• Backrest height: 620 mm

Total height: 1000-1100 mm

• Total width: 630 mm

Total depth: 585 mm

• Armrest height from floor: 580-680 mm