Idaho Shirt // Basque Marine Heritage Collection: Albaola x Loreak Mendian. Help us to sponsor the anchor of the mythical nao San Juan whaler! We couldn't love it more than we already do! Warm shirt, perfect for cold, damp days. The Idaho shirt, with its great 'worker' look, is made from a blend of premium quality cotton. Its thick, dénim will make you feel right at home. This slim fit shirt adapts slightly to the body for comfort during everyday use.