size Small to Large and size Extra Large

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It will work with any ballistic or bump helmet

Its made of durable Mil-Spec 1000D Nylon and is very rigid and heavy duty

USMC HYFIN CHEST SEAL COMBO PACK (North American Rescue) Ballistic size Small to Large andVersatile combo pack designed for the treatment of both entry exit or multiple penetrating injuries to the chest Featuring NAR's patented HyFin Chest Seals with enhanced adhesive technology designed for a superior seal in the most adverse conditions, including sweaty or hairy casualties Includes one HyFin Occlusive & one HyFin Vented Chest Seal packaged in a clear resealable pouch Large, easily visible red elliptical tabs designed to allow for single