Field clothes, field boots, and field equipment, including geologic hammer and hand lens must be purchased before arriving in Bozeman.
Because of the highly variable temperature from morning to afternoon on a typical field day, a windbreaker over a sweater or sweatshirt is a more versatile field dress than a heavy jacket over just a t-shirt.
At least two pairs of hiking or work boots are strongly advised; sneakers are unsatisfactory for virtually all of the field work.
Rain gear that is compact enough to be easily carried in a simple day pack is a must. A hat or cap for protection against both rain and sun will be necessary
for your times away from the field. Comfortable and casual clothing is suitable.