From Uppinghams website:

Composition: 100% Lambswool
Brand / Spun: Z.Hinchliffe / UK
Yarn Count: 2/17nm ( 2 ply)
Instructions: Knit using 2 strands on a 5 gauge (Standard Gauge) on high tension.
Washing: Hand or low wool wash.
Package Weight / Length: 900g cone - 7650m