We love Zig Zag!
Zig Zag is a robust blend of 75% superwash wool and 25% nylon, so whilst it's perfect for socks, it's also brilliant for other 4ply projects. Think mitts, legwarmers (yesssss!), hats, even jumpers. Well maybe not the whole jumper, it is rather bright, but certainly to add some vivid stripes or colourwork into your project.
Each 100g ball is approximately 420m, so great length. You get a free sock (knitting) pattern with every ball you buy, too.
King Cole suggest needles of 3.25mm but for socks we would suggest trying smaller, say 3mm or even 2.75 to get a nice crisp finish. As ever, you must check your tension, especially when changing needle sizes.