J. Crew Fisherman cable crewneck sweater.

The sweater is J.Crew Irish Donegal wool sweater, known for its distinctive appearance and warmth. J.Crew has historically offered various sweaters made from wool spun in Ireland, particularly utilizing Donegal. Donegal wool is named after County Donegal in Ireland, where the yarns were traditionally spun. It's characterized by its natural insulating qualities and unique colorful flecks or "neps". J.Crew emphasizes the warmth and sturdiness of their Donegal wool sweaters, making them suitable for colder weather conditions.