Yarn:
4 x 100g balls of yarn.

Additional items:
4mm crochet hook (optional).

From the pattern description:

Worked in simple stocking stitch with deep ribbed welt, cuffs and centre panel, this classic sweater is subtly shaped at the side edges for a more-tailored fit.

Easy to knit in stocking stitch and rib but attention must be paid to shaping.