The EXFIL LTP (Lightweight, Tactical, Polymer) bump helmet offers a stable, comfortable platform for mounting night vision and other accessories while providing the highest level of impact protection. The built-in NVG shroud utilizes an integrated machined aluminum shroud insert. The helmet features a Zorbium foam liner along with a CAM FIT Retention System with easily adjustable Cam Lock sliders and a micro-adjustable Boa Fit System. Available in two colors: Black and Coyote Brown, and two sizes: Size 1 (M/L) fits head circumference 21 1/2" – 23 1/2" (55cm – 60cm), hat size 6 7/8 – 7 1/2, Size 2 (XL) up to 24 3/4" (up to 63cm), hat size up to 7 7/8. Measure head circumference as shown in head form image.