Air intake before aerodynamic balance, negative pressure before and after air intake, combined with periodic ventilation, provides direct ventilation, making the wearer dry and comfortable.The airflow window is designed to keep dry and breathable at all times. The double lens design is to wear the inner lens of the tea sheet to prevent ultraviolet radiation and protect the eyes,The safety quick buckle can be adjusted at will when wearing. When releasing, it can be released with one hand with only a slight pull.