The bicike folding helmet is a safety & fashion product. Complies with CE and CPSC bicycle helmet safety standards. Outward design added more casual & fashion elements, suitable for bicycle commuters. Folding width of only 70mm, and the same width as the iPhone X, small size and easy to carry. The buffer structure is composed of multiple hexagons, each of which can be folded and contracted. The buffer layer material is a biodegradable composite, light weight, high and low temperature resistance, bending resistance, impact resistance. The webbing system is based on a design that fits the face of engineering and has good stability throughout the webbing system of the breaker.