Aurifil threads and Hoffman Fabrics have teamed up to offer this inspiring thread set sure to give your Challenge project the extra edge. Ten colors of 50 wt thread have been specially selected to match a stunning new batik collection in vibrant shades of pinks and purples. Suggested needle: 70/10 or 80/12. Hoffman Challenge 2025-2026: Amethyst thread set, 10 spools of 220 yds, 50 weight, 100% cotton Mako thread from Aurifil. Colors included: 4651, 3660, 3840, 1100, 2530, 2214, 2423, 2560, 2540, 2479