It might not be the fiber itself, but something that was used when they were processing it- (maybe chemical in nature) that is still in the fiber. I thought both the alpaca types were the same like 2 breeds of sheep are the same. Both the same animal essentially.
Suri Dream is 74% Suri Alpaca, 22% Peruvian Highland Wool, 4% Nylon. And since you can wear your alpaca hat with no problems, it could be some chemical that was used in processing the alpaca you are using. What brand are you using?
Guess I should have read Pickles post a little more thoroughly. In other words, ditto on what Pickles says on the processing.
Well, Baby Alpaca is 100% baby alpaca. It doesn't specify whether it is suri or huacaya. The Brushed Suri from Blue Sky is 67% baby suri, 22% merino and 11% bamboo. So unless it has something to do with the processing, I can't imagine the difference.
I am very allergic to angora rabbits, but not to angora fiber. But many animal allergies are due to the dander, not the fiber itself.