PARTSMART SMR812591 Bump Cap, White This white bump cap is both tough and lightweight and will provide protection against hazards that can inflict painful bumps and lacerations. This cap will adjust to 13 head sizes, in addition to 3 crown heights. These PARTSAMART bump caps are perfect for fast lube shops, maintenance people, mechanics, and other similar types of occupations. Note: Bump caps are not industrial protective helmets, and are not to be used for protection against falling objects. When using these caps, goggles can be carried by the bump cap suspension through the use of retainers on the suspension head band. Additionally, these caps will grip the strap of most goggles, making them almost part of the cap.