Metal-Frame Folding Chair for Classrooms and Training Rooms

Whether a seat is comfortable or not depends on the dimensions of the human body. There are differences among different groups of people. Generally speaking, northerners are taller, while southerners are slightly shorter. The same applies to North America and Europe. There are also differences between men and women, as well as between individuals. Therefore, to determine whether a seat is comfortable or not, you need to try it out. The following points are crucial: 1. Seat height: It should be equal to the length of the lower leg, allowing the lower leg to naturally hang down and the feet to touch the ground. If the seat is too high, the lower leg will be suspended, and the area under the thigh will be under excessive and prolonged pressure, which is not good. If the seat is too low, the thighs cannot rest on the seat, and the body weight will be concentrated on the buttocks, which can also become uncomfortable over time. 2. Seat depth: For chairs mainly used for sitting, the seat depth should be equal to the length of the thigh. When sitting down, the bend of the knee joint should align with the edge of the chair. If the seat is too deep, there will be no support for the lower back. If the seat is too shallow, the thighs won't have enough support, and it won't be comfortable. 3. Materials of the seat and backrest: Both should be of the "soft on the outside, firm on the inside" type. The frame should be sturdy enough, but there should be a certain thickness of elastic layer on the surface. The material in direct contact with the body should be breathable, durable, stain-resistant, and not prone to static electricity with the body or clothing. 4. Backrest: It is best if it can provide full or partial support for the waist, back, and neck. The longer you sit in a chair, the better the support should be. For dining chairs that are only used during meals, the neck support can be neglected. However, for office chairs, it is best to consider all aspects and pay extra attention when selecting one.