Fits ACH / MICH 2000 helmets and ACH / MICH 2002 Gunfighter Cut helmets >Does NOT fit ACH / MICH 2001 Special Forces Side Cut helmet, RBR helmets or any helmet that is not a MICH style helmet with the exact mounting hole pattern >Lightweight, multi-impact, ventilated liner system with repositionable EPP impact pads and LDV closed-cell comfort foam that is not affected by temperature, altitude, or moisture >Pads are pre-molded to the shape of a head - no more “flat" blocks >Occ-Dial adjustable fitband with replaceable leather front, nape, and side pads quickly detaches to allow convenient donning and doffing of COMs headsets with internal top headbands >Integrated Head-Loc chinstrap retention system gives helmet 4x more stability than standard issue ACH helmet suspension / retention >Easily installs using existing Velcro hook interior disks and chinstrap mounting holes