Jackson offers a complete line of head protection - from safety caps and hats to bump caps in a wide selection of colors, slotted and non-slotted designs and suspension options. Slotted caps allow flexibility in attachments such as faceshields, welding helmets equipped with mounting blades* and hearing protectors. Chin straps are available for all models. All safety hats and caps comply with ANSI Z89.1 standards.* *Bump cap not included. Protective helmets are classified according to the specific impact and electrical performance requirements they are designed to meet. All protective helmets in accordance with this standard shall meet either Type I or Type II impact requirements. In addition, all helmets are further classified as meeting Class G, Class E, or Class C electrical requirements. Type I: Helmets intended to reduce the force of impact resulting from a blow only to the top of the head. Type II: Helmets intended to reduce the force of impact resulting from a blow which may be received off center or to the top of the head. Glass G (General): Helmets are intended to reduce the danger of contact exposure to low voltage conductors. Test samples are proof-tested at 2200 volts (phase to ground). However, this voltage is not intended as an indication of the voltage at which the helmet protects the wearer. Class E (Electrical): Helmets are intended to reduce the danger of exposure to high voltage conductors. Test samples are proof-tested at 20,000 volts (phase to ground). However, this voltage is not intended as an indication of the voltage at which the helmet protects the wearer. Class C (Conductive): Helmets are not intended to provide protection against contact with electrical conductors. SC-3 non-slotted design Fully dielectric Design withstands temperature variances, humidity, and exposure to UV light for long-lasting wear Suspension options: ratchet only (391)