As someone who works with yarn, the outside and the inside might be different fibers.

The outside is definitely wool and I appreciate the singed toes in the name of science. But the inside lining doesn't look like wool at all. Snip off a bit and see how it responds to flame.

Edit: It's probably polyester of some kind, so be very careful!

Unfortunately, I no longer sell alpaca products, just raw fiber for spinners.
Kim

The inside as well as outside material (yarn?) definitely
does not burn, so I have assumed that it is all wool, however,
I don't know if there is any other material synthetic or
otherwise that is fire resistant, and have not yet established
if this yarn is Sheep or Lama based, and as I am going down
the hill next week, I am planning on stopping by the Lama Farm
on 285 to see what they can tell me, or at least they might
be able to point me to someone who can help


Feature Meaning Alpaca Wool
Fireproof Able to withstand fire
Fume hazard The potential damage of smoke and toxic release
Fire resistant A degree of resistance to fire
Flame-retardant Slows down the spread of fire
Slow to ignite Time it takes to set something afire
Self-extinguishing The ability to cease burning once the source of heat has been removed
Low heat-release /
Flammability Fire spread rate and burn severity
Doesn’t melt The reaction after catching fire: melting


The mystery continues

Okay, while wool is flame-resistent, it will eventually burn. However, it won't melt. All natural fibers that I know of turn to ash instead of melting after they ignite.

Some synthetic fibers are pretty flame-resistent, but they will melt after they burn.

Definitely ask the experts down the hill and let us know!