Sunlight Activated, color changing thread. Any ultraviolet light makes this thread quickly changes into a colorful embroidery. Appears white until exposed to light and then gives off a day-glow color change. Blue Solar Activated Embroidery Thread, UV Sensitive, 100% Polyester, 1100 Yard Cone.
Available in Seven Pastel Shades: Yellow, Orange, Pink, Blue, Coral, Purple, and Green.
100% Polyester (40 weight) embroidery thread on 1,100 yard mini cones.