The fingers can be knitted plain or stranded; the instructions include both versions. Stranded fingers are less stretchy and may fit a little snug, especially if you have larger hands. If that's the case, I recommend knitting fingers in solid color, or using larger needles.
The PDF has multicolor charts, but as you can see on the photos, bicolored version looks nice too.
Instructions are written for circular needles (magic loop method); adjust if using DPNs.