Echo Wool and Tussock sing beautifully together in our free Duet Hat pattern. Echo Wool is 100% recycled wool, a sport-weight to DK-weight yarn with an earthy feel, a lively tweed look, and an offhanded elegance that you will love. Tussock combines 60% super fine kid mohair and 40% mulberry silk for a light and luminous lace-weight yarn that impacts the color of the hat in surprising ways. Knitting them together creates a lush, warm fabric with a delicate halo that floats above the surface, and there are hundreds of color harmonies to explore!