Two-colour brioche is a marvellous technique. It creates a lovely, squishy texture that is really comforable to wear. Plus, it can be used to create quite intricate geometric patterns.
In this case it is a cowl knitted flat with a criss-cross pattern. It starts with a provisional cast-on and is finished by grafting in two-colour brioche.

The pattern PDF is 8 pages long and contains

• row-by-row pattern instructions
• chart of a pattern repeat
• photo tutorials for the techniques you need for this piece: the combined decrease-by-4-and-increase-by-4 stitch, provisional cast on (with crochet hook and scrap yarn), and grafting in two-colour brioche

The amount of yarn listed is for a double-length cowl, i.e. a cowl that fits twice around your neck.