Pure wool
Label shows textile number 165x2 (#6/2) which means 6 meters per gram and the yarn is 2 ply, i.e. 300 m / 100g

Label lacks information on recommended needles/hooks and gauge. Neither can be found any clear indication of color number or dye batch.

I have knitted socks using 3 mm DP needles producing a gauge of about 28 stitches per 10 cm, giving a firm but not too tight fabric.