SolarActive Embroidery Thread 700(yd) Yard Mini Snap Spool &ndash; White to Magenta Solar Active White Thread Changes Color White to Magenta in the Sun Thread (700 yds ): White to Magenta that change color for years with 1 Thread (700 yds) SolarActive Changes color immediately when exposed to sunlight, even on cloudy and rainy days! The original 'Powered by SolarActive' - Satisfaction Guarenteed! Contact us to save on shipping for multiple threads! Ships within 1 business day with tracking number. Buy 3 and get a free gift!