Half helmet with tail lights are so expensive mainly for the following reasons:
1. Materials
The outer shell materials of half helmet with tail light are usually PC and PVC. The one-piece helmets are basically made of PC, and the price of PC is much more expensive than PVC. Naturally, the price of PC is particularly advantageous. It is durable and cold-resistant, and PVC is much worse. The inner lining is also extremely important. A good inner lining is not only comfortable for the rider to wear, but also plays a very good cushioning role in the event of an accident, and it is also easy to clean.
2. Craft
Half helmet with tail lights are mainly divided into two forms: one-piece and non-one-piece. Generally, when buying  with tail light, you will choose one-piece molding, because such a half helmet with tail light and cap body fit better and have greater strength, but the process requirements are also higher, and the price is naturally more expensive.
3. Design
The premise design skills of half helmet with tail lights are important and cumbersome, shape, structure and pattern. Especially in the current era of pursuing lightweight, it is necessary to ensure its strength, small wind resistance, and comfortable wearing. It has to be said that research and development is difficult.
4. Test
Half helmet with tail lights need to go through extremely complicated and rigorous tests before they can be officially launched, which will increase costs and lead to price increases.