The newest yarn from Kelbourne Woolens, Camper, is fingering weight, 100% wool, and perfect for colorwork. It's soft and sturdy and has cute campers on the label, so you can't go wrong.
100% wool
2ply heathered
200 yards / 50 gram skein
26-30 sts = 4” (10 cm)
US 1-3 (2.25-3.25 mm) needle