Any Sunday Knits sport-weight yarns.
Substitute any sport-weight yarn that works nicely to gauge: 1400 (1520, 1730, 1950, 2080) yds for tunic length; 1110 (1220, 1400, 1590, 1700) yds for hip length.
It is worked seamlessly from the top down in a modular fashion, so lots of fun to knit. I especially love the border stitch pattern, which is reversible, and the slant pockets. They’re optional, but you’ll surely want some.