Bandages are a key component of any emergency trauma kit. The ability to apply direct pressure over a wound and to keep the pressure applied over long periods of time is crucial to controlling severe bleeding. That's why militaries and civilian personnel carry H&H Medical bandages in their first aid kits and trauma packs.
WARNING: There have been counterfeit H-Bandages sold internationally. Make sure you buy genuine H&H products. Read more about this here.