The 2021 Aurifil Color Builders were created in part to herald and highlight the very first thread weight produced by Aurifil: 40wt. They are a capsule of 12 mini-collections dedicated to an incredibly worthy cause that falls in line with the goal to increase Aurifil's sustainability and positive environmental impact — Endangered Species. Each collection contains three large spools of their supple and strong 40wt thread — a warm, a medium, and a dark. Aurifil has drawn their color inspiration from 12 magnificent animals, currently in dire need of attention, advocacy, and compassion. The company is dedicated to highlighting their stories, helping to educate on their struggles, and working to create valuable change via awareness and fundraising. To help achieve these goals, Aurifil is collaborating with Earth League International and are looking forward to a strong and effective partnership. 40wt cotton is perfect for piecing, machine appliqué, quilting, or embroidery, giving smooth, elegant seams and an incredible palette of color. 2-ply thread is made from Long Staple Egyptian Cotton.