This is Quick-Clot. A gauze pouch filled with a mineral wich absorbes the moisture from the blood, leaving the clotting-factors inside the wound, stopping the bleeding.

Please realise that Quick-Clot is a absolute last-resort means to stop a bleeding. You've got to use gauze, pressure, tourniquet, etc. first. If that doesn't work, then you can use the Quick-Clot.

It's also recommended that you get training on how to use it and after using it, you've got to get to the hospital.

The new thing about the Quick-Clot sport is that it contains silver, wich inhibits bacterial grow. I only use the Quick-Clot ACS+

So, it could be a good addition to a FAK, but only if you know what you're doing!!