Plaidwerx: Clan Douglas Ancient Tartan Shop Plaidwerx: Clan Douglas Ancient Tartan Shop "Clan Douglas Ancient Tartan" Art Print for Sale by plaidwerx Redbubble Douglas Tartan Etsy. Product Detail: Each sweater is constructed from a premium woven polyester that is ultra soft and incredibly comfortable. Features a specialty high definition heat dye application that ensures long lasting color vibrancy even after machine washing. Fabric is durable and resistant to wrinkles, shrinking and mildew. Finished with elasticated cuffs and waist for a stylish fit. Each sweater is custom printed, cut and sewn just for you when you place your order there may be small differences in the design on the seams and or arms due to the custom nature the production process!