Safety is airsoft's #1 rule with many airsoft arenas and fields requiring players to wear full face protection. With this mask you'll have that covered with its sturdy and ventilated polymer shell and perforated steel mesh lenses. Each layer has been designed to withstand and stop BB impacts from 380 FPS and above. The lens is constructed out of metal mesh that is negates fogging and condensation issues to provide players a clear, but protected field of view. Also designed for comfort, the entire mask is easy to breathe with its ventilated design and uses a easy to use elastic band system that is fully adjustable to fit most head sizes.