Waterproof tartan poncho Waterproof fishing poncho 100 Tartan Ponchos Knitted poncho, Ladies poncho, Poncho Multifunction Polyester Taffeta Waterproof Outdoor Rain Poncho Buy Tartan Showerproof Poncho for GBP 44.95 BARBOUR_GB. Ensure you're festival ready with this packaway waterproof poncho in our classic tartan pattern. With a handy hood for the unpredictable weather, the poncho is finished with reflective Barbour branding printed to the chest.