Coats Dual Duty XP The origins of Coats & Clark thread by Annette Millard January 24, 2017 by Annette Millard January 24, 2017 Are you well on your way to making pampering Spa Slippers? Before we get into the details of Coats Dual Duty XP thread and its varieties, let’s step back in time a little and take a glimpse at the 250 year history of Coats & Clark threads. I always wonder … FacebookTwitterPinterestLinkedinRedditWhatsappTelegramEmail