Buy a helmet that bears a label saying it meets the American National Standards Institute (ANSI) standard Z90.40 1984; the Snell Memorial Foundation standard B 90,B 90S, N 94, or B 95; the American Society for Testing and Materials (ASTM) standard F 1447 93 or F 1447 94; or the Canadian Standards Association standard CAN/CSA D113.2 M89.