Nothing quite like an actual Aran Sweater combines elegance, coziness, and rich Irish heritage. The Aran Islands' women began hand-knitting these clothing items using only pure Irish wool in the 17th century for the local farmers and fisherman, beginning the tradition of the Aran Sweater. Aran sweaters were made of wool, which naturally contains oils that keep them warm and water-resistant even in the face of chilly, wet Atlantic storms.