Explore Mercer Tartans Explore Mercer Tartans Mercer Turtleneck Sweater in Coziest Yarn Madewell BREA Ladies Tartan Check Design Sweater Sale Mercer Modern Tartan Classic Fitted Skirt Celticprime.com celticprime. 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!