Fibre-Metal® FM400DCCL Dual Crown High-Performance® Faceshield is for full face and neck protection. The F-400 series incorporates a 4" deep crown protector as well as a 4" deep chin protector with an .060" thick clear propionate window inbetween. This model is mounted to a versatile free floating headgear with ratcheting adjustment for a snug yet comfortable fit.