Products for Sale › Shetland Wool Bio-Nylon Blend 'Rustic Gray' Combed Top Roving Dyed Wool Spinning Fiber Gray Shetland Wool Bio-Nylon Blend 'Rustic Gray' Combed Top Roving Dyed Wool Spinning Fiber Gray $14.99 4oz of 75% Shetland Wool, 25% Bio-Nylon Combed Top Blend. This blend would make amazing sock yarn that will wear really well. It is a heathered gray blend. All my fiber is ready to ship right away, and sent first class USPS. Happy spinning and felting! Add To Cart Added! 4oz of 75% Shetland Wool, 25% Bio-Nylon Combed Top Blend. This blend would make amazing sock yarn that will wear really well. It is a heathered gray blend. All my fiber is ready to ship right away, and sent first class USPS. Happy spinning and felting!