For stiff synthetics I recommend Princeton 6300 series, Silver Bristle or Rosemary Ivory series.
For a natural bristle, any good quality manufacturer will do. (Robert Simmons, Silver brush, Windsor Newton etc.)
NOTE: Bringat least 2 brushes which are ¾” and 1” wide
Supplies
Medium: Refined linseed oil, but not cold pressed (NO STAND OIL)
Odorless paint thinner for rinsing/cleaning brushes
Rags or paper towels
Palette AT LEAST 11 x 14 or bigger
Neutrally toned gray canvas or panel: Use Dick Blick matte acrylic “warm gray” for toning
Panel/canvas size range 14 x 18 to 16 x 20 inches. Students need 1-2 canvas/panels for each day of the workshop
Paint cups or old cans
NOTE: Bring jars or cans for your thinner at least 3” in diameter