West Yorkshire Spinners Signature 4 Ply is a made from 75% Wool and 25% Nylon. The wool content contains 35% luxurious Bluefaced Leicester making this one of the most sumptuous 4 Ply products on the market. Available in a range of solid and mixed shades. Ideal for socks! West Yorkshire Spinners Signature 4 Ply Sock Yarn. All shades of the award winning British sock yarn by West Yorshire Spinners. Well loved and favoured by knitters and crocheters nationawide for it's smooth texture, excellent stitch definition and alluring shades. Signature 4 Ply is a sumptuous yet durable blend of 75% wool and 25% nylon, containing at least 35% luxurious Bluefaced Leicester. 75% Wool 25% Nylon 400m (437yds) per 100g ball 3.25mm (UK 10 / US 3) 28 sts x 36 rows in 10cm (4in)