This luxurious blend of 75% Merino wool and 25% silk lends itself beautifully to felting very fine fabrics. Wool and silk are naturally attracted to each other, thus, the silk in this top acts as a bonding agent to the wool when felted. This creates a more durable felt, and as a result, allows you to felt fabrics that are so light they float in the air, yet are very strong and can withstand everyday wear. In-Silk Tops are individually packaged in 50 gram bags.