Marti BT HD

Mechanism

The chair is equipped with a synchronous LP11 PLUS movement mechanism. Once the selected position is released, the backrest tilts backward in response to the movement of the user’s back. The backrest movement is synchronized with the seat movement, though the seat moves much less noticeably. The mechanism allows for smooth seat height adjustment and also includes a seat depth adjustment feature, which controls the distance between the seat and the backrest. This helps prevent thigh pressure and enables users of different heights to benefit from the backrest function. The seat depth adjustment range is 5 cm.

Smart Move Technology

Marti chairs are produced using technology developed and implemented in Poland by Grospol—Smart Move. This technology addresses the needs of active users who value intelligent solutions. Its main goal is to enhance sitting ergonomics and reduce back strain during long office hours.

Thanks to the unique design of the backrest, it dynamically adjusts to the user’s movements in the chair. The back is supported along its entire height, both during regular work and when reclining or making lateral movements, where the support shifts to the right or left side of the back.

Backrest

The backrest of the Marti BT chair is designed with maximum comfort and ergonomics in mind. Made from cut foam with a density of 25 kg/m³, it provides the right balance of softness and durability, perfectly conforming to the user’s back for long-lasting comfort, even during extended periods of use. The entire backrest is upholstered in a selected fabric, allowing for customization and integration with the office’s aesthetic.

Lumbar Support

A key feature of the backrest is the adjustable lumbar support, which can be tailored for both height and depth. This allows users to precisely match the support to the shape of their spine, especially important for the lower back, which is most prone to strain during long periods of sitting.

Armrests

The chair is equipped with 3D adjustable armrests that ensure proper positioning of the forearms and hands for desk work. Two armrest models are available: R10 or R11.

• R10 Armrests:

  • Height adjustment (up-down): Allows the armrest to be adjusted so that the forearm forms a 90-degree angle with the torso, significantly reducing back muscle strain during long hours of sitting. The height adjustment range is 75 mm.
  • Depth adjustment (front-back): Adjustable within 40 mm, allowing the armrest to be tailored to the forearm length.
  • Pad angle adjustment: +/- 15 degrees, with a soft pad for comfortable use.

• R11 Armrests:

  • Height adjustment: 80 mm range.
  • Depth adjustment: 45 mm range.
  • Pad angle adjustment: +/- 34 degrees.

Seat

The seat is contoured and made from durable, deformation-resistant foam with a density of 25 kg/m³. It is upholstered in a selected fabric from Grospol’s wide range of options.

Base

The lightweight mobile base is available in either black or polished aluminum. It comes with 60 mm diameter wheels, which are safe for parquet and laminate floors and work well on carpets too.

Warranty

The product is covered by a 3-year door-to-door warranty, ensuring full convenience and comfort for the user.

Dimensions

Seat: 490 x 390-450 mm