Helmet: The Helmet Should Confirm To Is: 2925 With Latest Amendments With The Following Additional Features: 1. Comfortable To Wear. 2. A Strong Chinstrap, With Limits Of Risk Of Losing The Helmet During A Fall. 3.Ventilation Holes Allow Airflow Through The Helmet Ventilation Holes To Allow The Ventilation To Be Adjusted As Needed.4. It Should Have Designed For Optimal Attachment Of A Headlamp, A Protective Shield, And Hearing Protection. 5. It Should Absorb Impacts By Deformation Of The Expa