Barbour Case Fair Isle Crew Neck Jumper Willow Green Potters of Buxton Case Fair Isle Jumper Men's Fair Isle Jumper Barbour Case Fair Isle Crew Neck Jumper Willow Green Potters of Buxton Barbour Lambswool Case Fair Isle Jumper Jules B. This crew neck sweater is knitted with a colourful Fair Isle pattern framed by contrast ribbing at the collar, hem and cuffs. Crafted in super soft lambswool, this distinctive piece is finished with a signature flag label at the side seam.