Barbour Small Amble Leather Billfold Dark Brown. Small and discreet, Barbour Small Amble Leather Billfold is ideal to carry your card with ease. Featuring a smart, classic appearance, the Amble Leather Billfold is perfect for slipping into your back pocket with ease perfect if you\\\'re out on a trip and don\\\'t need to bring the entire card collection. Lined with Barbour\\\'s classic tartan trim lining for a traditional finish, the Amble Leather Billfold is RFID protected which prevents your cards from authorising contactless payments.