Features 1) Chin strap lined for comfort 2) Front rails can be installed a night vision 3)Tactical Side Rails fit all kinds of accessories 4) Replacement Internal Pad and Headband Set available 5) Helmet internal full use of high quality foam. Lightweight, ventilation, Can be disassembled independently 6) Doffing of COMMs headsets with internal top headbands 5) Size: One Size Fits Most, Adjustable 7) Completely adjustable from size of headband to height of helmet 8) Hook&Loop attachment on the outside could be used to attach patch 9) Closed-cell comfort foam that is not affected by temperature, altitude, or moisture 10) FAST-ARCs - 4 Position Accessory Rail Connectors: non-snag attachment points for quick yet secure donning or doffing of head borne accessories, including lights, cameras, goggles, COMMs, mandibles, etc. Package include 1)Mich Helmet*1 2)Replaceable buckle and foam pad kit*1Great for training, search and rescue, climbing, tactical, hunting, shooting and other outdoor sports etc. Warning: This item is for adult only. Side Rails fit a variety of accessories, Integrated NVG mount compatible with most GoPro NVG style mounts (NVG mount not included). Velcro Panels on right, left, and backside of helmet for Morale Patches, Nameplates and IR / Reflective Tabs. Simple installation and easy removal ,adjustable internal padding, replacement internal pad and headband set available.Adjustment Rear Dial Knob for Head Size adjustment. ABS material. Lightweight, Durable,Hard Shell Design.Inner Material: Foam. Recommended Uses For Product: Cycling. Vehicle Service Type: GoPro. Outer Material: Acrylonitrile Butadiene Styrene. Special Feature: Adjustable,Lightweight. Size: One Size. Age Range (Description): Adult. Color: Black. Brand: EMERSONGEAR. Date First Available: March 21, 2019. Best Sellers Rank: #100,031 in Sports & Outdoors. Customer Reviews: 4.4 out of 5 stars 282 ratings 4.4 out of 5 stars. : B07PZR5G9D. Size: ?One Size. Outer Material: ?Acrylonitrile Butadiene Styrene. Part Number: ?EM5658B. Manufacturer: ?EMERSONGEAR. Color: ?Black. Brand Name: ?EMERSONGEAR. Package Weight: ?0.85 Kilograms. Item Package Dimensions L x W x H: ?10.87 x 8.98 x 7.01 inches.