We care about your health!

We, Ev Tool OÜ, specialize in the development and production of ergonomic chairs. We are based in Estonia and have been working in this field for seven years.

The key difference between our chairs and all existing types of ergonomic chairs is that sitting on our chairs benefits the body, especially for school-aged children. The concept of our development, the Equilibrium Point System (EPS), was introduced by a professional doctor specializing in musculoskeletal system disorders.

Ordinary chairs, including those designed for people with back problems, follow the principle of minimal energy consumption. However, this is not always beneficial. Modern humans suffer from hypodynamia, leading to metabolic disorders, cardiovascular diseases, spinal issues, and more. The EPS technology creates conditions for effective work while maintaining the physiological energy expenditure necessary for health.

Differences Between EPS Chairs and Regular Chairs

1. Shortened Backrest

Why shorten the backrest when sitting on a high-backed chair is comfortable? When leaning against a high backrest, the muscles supporting the spine remain inactive, creating an illusion of relaxation. However, it is well known that muscles weaken and atrophy when not engaged for extended periods.

Proper posture is primarily supported by the spine and surrounding muscles. Some muscles are short, connecting adjacent vertebrae to keep them aligned—these are called “safety muscles.” Others are long, spanning multiple vertebrae to provide mobility. The coordinated function of these muscle groups ensures both stability and flexibility of the spine.

Studies have shown that prolonged sitting with back support disrupts the function of short muscles. While long muscles retain their ability to function, they cannot maintain vertebral alignment alone. This is why most high school students today have poor posture and scoliosis. These minor misalignments, often unnoticed at first, lead to muscle strain, poor blood circulation, disc deformation, and other spinal issues in adulthood.

For those who sit for extended periods, maintaining the function of spinal safety muscles or restoring their activity requires sitting on chairs with a shortened backrest. Such a design supports only the sacrum while allowing the upper joints, ligaments, and spinal muscles to remain engaged.

2. Backrest Tilt Angle Less Than 90 Degrees

This design ensures that the sacrum is positioned correctly, preserving the spine’s natural curvature across all sections.

3. Dynamic (Rocking) Seat

This feature achieves several benefits:

  • The dynamic attachment of the seat distributes varying loads on the paravertebral and thigh muscles, reducing hypodynamia and promoting blood circulation.
  • The seat’s movement range allows users to lean slightly forward, making desk work more convenient, improving posture, and reducing fatigue by the end of the day.
  • Pediatricians have observed that when children tilt their chairs forward while doing homework, their backs remain straight. This promotes proper posture, benefiting their spinal health for life.

The seat has two fixed positions, ensuring all-day comfort. Whether sitting on the edge, leaning back, tilting forward, or sitting upright, the EPS chair promotes correct posture. The combination of a dynamic seat and a shortened backrest supports functional spinal elements while preventing the negative effects of prolonged sitting.

Benefits of Equilibrium Point System (EPS) Chairs

  • Encourages Proper Sitting Posture
    The unique design ensures that incorrect posture feels uncomfortable. Users naturally adjust to a comfortable and ergonomically correct position, distributing spinal load harmoniously and reducing health risks.
  • Activates Blood Flow & Reduces Static Tension
    The human body constantly makes micro-movements, alternating muscle activity for circulation. The EPS chair’s dynamic design meets this need for movement while maintaining proper posture.
  • Strengthens & Restores Muscles Responsible for Spinal Health
    Traditional chairs, with numerous supportive elements, prevent joints, muscles, and ligaments from engaging in their natural functions. This leads to poor circulation, muscle atrophy, spinal issues, and fatigue. The EPS chair acts as a passive training tool—whether at home, work, or school, users strengthen their bodies and maintain spinal health without conscious effort.
  • Provides Passive Seating Comfort
    Movement is essential for health, but excessive strain is counterproductive. Just as standing all day is tiring, sitting on a rigid chair without a neutral zone is also uncomfortable. The EPS chair offers two seating positions—horizontal (familiar) and slightly tilted forward—to ensure passive ergonomic comfort.
  • Ensures Safe Movement & Enhanced Durability
    Research has shown that rocking motions are beneficial. The EPS chair’s controlled rocking mechanism operates within an optimal range, enhancing comfort while ensuring the chair’s long-term durability.

Our Mission

Our goal is to bring tangible health benefits to society. In designing and manufacturing our products, we prioritize accessibility to ensure they are available to as many people as possible.