 These reactions are likely a sensitivity to thicker and coarser fiber diameter or fiber ends.In fact, contrary to popular belief, wool allergies are practically unknown.According to a study reviewing the evidence of wool as an allergen conducted by 
Acta Dermato-Venereologica  contemporary superfine or ultrafine Merino wool with their reduced fibre diameters do not provoke itch, are well tolerated and in fact benefit eczema management.