Joules Mens Retford Crew Neck Jumper in French Navy Marl. The Joules Mens Retford Crew Neck Jumper is a smart yet practical jumper ideal for keeping out the chill. The Retford Jumper offers a crew neck, ribbed cuffs, neck line and hem and the Joules Hare embroidery on the left chest. 75% Wool, 20% Polyamide and 5% Acrylic. Hand Wash Only. Do not tumble dry. Iron on a low heat.