Fish and Fire paracord is like regular 550 cord only better. Most paracord today is type III 550 paracord, which is the commercial version of Mil-Spec 550 Parachute Cord. The type III cord has a 32 strand woven nylon outer sheath. Housed in the sheath are 7 - 2 ply cabled inner nylon strands. These nylon strands are normally the only things filling the sheath. They can be removed from the sheath and used separately in the 2 ply cabled form or uncabled (unwound or untwisted) and used as a small single strand of nylon string.
The fish and fire cord also has a 8 lb monofilament fishing line inside the sheath. It can be pulled out of whatever length of cord you have cut. The monofilament fishing line holds knots well and is flexible. This type of fishing line has some stretch to it and is more forgiving than a static fishing line. It is also a little larger or thicker and resists abrasion along with making a better fishing line than the nylon inner core strands.
Another item included in the sheath of the fish and fire cord is a strand of natural jute. The jute is purposely not coated with addition fire accelerants. It is a safe every day carry item. Jute is a fibrous material and can be used as tinder help start a fire. If the natural jute gets wet it will dry quickly and be ready for use.