Crazystone's MICH Action Version Tactical Helmets For Airsoft Paintball / CS Game Helmet 2-color/2-size Please measure head size before making an order Head circumference 56-61 cm22-24 inchadjustable Size 1:665g;Material:ABS, simple action version;The liner is Elastic Memory Foam;Lighter weight, not only can provide effective protection , more suitable for long wear. Size 2:980g;Material:high strength ABS,PP buckle;Thickness:6mm;High density matte particles painting process, reflective rate reaches the minimum value. Helmet accessories:1 helmet,2 rail,1 front head mount,9 velcro tape;Can be used with Comtac-I, Comtac-II, MSA SORDIN headset and PVS series of transfer arms