Dress tends to be quite conservative for both men and women.
For Men: conservative, dark colored suits. Wear shoes that are easy to slip on and off if possible.
For Women: conservative business suits or dresses and blouses are appropriate. Avoid tight fitting, short shirts, and sleeveless attire. Dresses should not reveal too much of the legs.
Dress in hotter seasons and parts of the country tends to be less formal.
Jeans and less casual attire are not recommended for a first meeting.
Business casual attire may be appropriate in certain industries/areas.