1. Light weight and easy to use 2. Comfort without risk 3. Adjustable universal size suitable for most men and women 4. Application: People who use computers and cars for a long time 5. The drop-shaped design fits the neck curve of the human body, and the opening is loose and does not catch the throat 6. According to the principle of ergonomics, with the medical traction force, the straight traction, scientific and comfortable
