This is a sporty looking set! Love the collar especially with the contrast colour. Set in sleeves are always really neat, and I just love the vintage feel all of these garments have. I'm quite taken with the stripes, too, which won't be difficult yet will still add a wonderful flair to this collection of staples.
This pattern's been written for King Cole Comfort DK, a truly lovely soft yarn. However, I think it would go well in most DK yarns. If you don't fancy changing colours and just want the construction of these garments, try Cherish DK, which will stripe itself for you!
You will need 3.75mm and 4mm needles.