an idea from another forum for minimalist FAK....individually wrapped on a cards

4' of roll gauze
4' adhesive tape
4' duct tape

from which you could make steri strips, bandages of most any size, and with the duct tape.. slings, foot blister protection, tourniquet

I suggested an upgrade....
4' Kerlix roll gauze...vacuum sealed to reduce volume
4' Coban self adhering elastic wrap
4' duct tape

with the Kerlix you had better blood stoppage, and the Coban you had additionally an elastic wrap for sprains