Tent Sewing thread 75 grey water repellent 1000 meters
Silver Grey Poly Poly Corespun Sewing Thread - Heico Direct
Gray Sewing Threads - 10 Large Spools of Polyester Thread for Hand, Quilting & Sewing Machine - Grey Shades Plus Black & White - 1000 Yards Per Spool : Amazon.co.uk: Home & Kitchen
Recycled 'Sew all' Universal all Purpose Sewing Thread 7500m Cones - James Tailoring Sustainable Haberdashery
Gutermann 305 Grey Natural Cotton Sewing Thread - The Little Fabric Shop
Linen sewing thread
WheateFull - Strong Nylon Sewing Thread for Outdoors, Leather Seats, Handbags, Shoes, Canvas, Upholstery and Grey Sewing Machine : Amazon.co.uk: Home & Kitchen