Ops-Core FAST SF Carbon Fiber Helmet Multicam L/XL (59-61cm) The FAST SF helmet is an advanced model that maintains the expandability and functionality of the conventional FAST helmet while improving its lightweight properties through design updates. This high-spec helmet is based on the SF helmet and has been upgraded for safety by changing the material from the conventional ABS resin to carbon fiber. It is a lightweight model with ventilation holes in the shell and is used by the military for training, etc. Large ventilation holes quickly release stuffiness inside the shell, allowing for comfortable and safe head protection. The new Skeleton ARC rail achieves a 30% weight reduction compared to the conventional ARC rail. It comes with an Ops-Core type Skeleton NVG mount, Velcro sheets, and ACH-ARC type rails. The Occ-Dial, the most distinctive feature of the FAST helmet, which allows for size adjustment, is also faithfully reproduced. By simply turning the dial on the back of the head, you can adjust the size of the inner band inside the helmet that surrounds the head. The helmet pads are removable and can be arranged to fit the shape of your head, making it adaptable to various head shapes. Manufacturer: FMA