Merino wool is completely natural, has no additional materials or parts and rarely causes allergic reactions.
Though some people claim to have an allergic reaction to wool. In many cases they actually respond to the itching caused by poor-quality hard wool. Allergies can also be caused by strong chemicals used to treat inferior wool products.
Allergic reactions in many cases are much more common with the dust mites. More specifically, allergic reactions are not caused by the mites themselves, but by their feces and other remains. Because the necessary conditions for mites to breed are heat and moisture (and wool is known not to retain moisture and evaporate it very quickly), so dust mites simply do not have the conditions to live and breed in wool.
In rare cases allergic reactions can occur to lanolin - a natural fatty substance that envelops wool hair and has antiseptic properties that prevent bacteria from multiplying. In such allergic cases, we suggest choosing alternative products.