TBP recommends having 2 (if not 4) triangular bandages (cravats) in your first aid kit for slings, swaths, splinting, bandaging, improvised tourniquets, and pressure bandages.
 
Made by Ever Ready or Dynarex, whichever is in stock
Made of 100% non-woven cotton
40” x 40” x 56” (102cm x 102cm x 142cm)
Individually bagged
2 safety pins included