They carry a single First Field Dressing - that's one of those Israeli Military bandage things if your not familiar with an FFD anf that is their FAK in its entirety. Its pocket sized and can go everywhere with you, even if you are not carrying a bag. It can be used for packing a very bad wound or it can be used to tie a splint and they generally can cope with a pint of blood before they start to 'leak'. And I do the same, that is my bleed kit, everything else is in a main FAK.
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As a slight aside, I may have missed this already so apologies if someone has already suggested it but a great addition to any main FAK is a Sam Splint. Essentially its some alu strips wrapped in closed cell foam. Excellent piece of kit for dealing with breaks and soft tissue injuries such as sprain etc. Its super lightweight, can be folded into any shape and it can be cut. It also makes a super dinner plate if you forget to pack yours
OLO
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