Aren't these just so fun!? I always love to see grey with pink together, I think it's a gorgeous and subtle way to make the best of both colours. I'm not going to lie, there's a lot of sewing in ends with this pattern. I am totally going to recommend doing that as you go, or at least piece by piece. For the arms, I'd suggest running the spare yarn up the side so you don't have to cut it on every stripe. You will thank me later.
For this pattern we would recommend using King Cole Comfort Aran which is smooth and smooshy, or our lovely King Cole Big Value Aran which is not as smooshy but is cheap and reliable. Both are basic arans which knit and wear well.
You will also need 4mm, 4.5mm and 5mm knitting needles.