Amazon.com: Bulingbuling Reflective Sewing Thread.Each Spool of Machine Sewing Polyester Thread is 1000M(1094Y), Used for Sewing, Embroidery, Repairing
Treedix 316L Conductive Sewing Thread Stainless Thin Conductive for Gloves Metal Thread Reflective Thread-2 Ply 9m/29.5ft 9Ω/m - Walmart.com
Upgrade Embroidery Thread to Reflective Thread – Angry Melon Gear