SULKY Cotton Blendables is a 30 wt cotton thread used for quilting and decorative stitching with gradual colour transitions. Heidi Lund’s “Life in the Tropics” collection includes ten coordinated spools inspired by bright tropical tones for accent stitching and creative threadwork. Stitch a test line on your fabric first so you can place colour changes where you want them in borders, blocks, and background fills.