If there were a hypothetical contest between all the fibers and fabrics in the world, we feel 100% confident that alpaca would win by a mile. Let's say that the contest is broken up into multiple events, in order to give every contender a fair chance-- alpaca still wins, in every category. Alpaca is the strongest fiber known to man; it's softer than cashmere, smoother than silk, stronger than mohair, lighter and warmer than wool, and better-breathing than thermal knits. Despite being fash …