Pastel Plein Air Painting Checklist:
A selection of pastels
Paper
Clips to hold down the paper in the wind
Fixative
A box of wipes to clean your fingers (or latex gloves if you use them)
Stomps, tortillons, etc as required by your personal style
Kneedable eraser
Tips: If you're going to be making several paintings, a large pad of pastel paper with interleaved sheets to protect your work is useful.
Half pastels take up more space than full-length ones (and weigh less!).
More Plein Air Painting Checklists: Watercolours
Acrylics
Oils
Non-Painting Essentials