Guests invited to a Bar Mitzvah typically wear dressy clothes; women wear a dress or pantsuit, while men wear a suit or pants and a jacket. Men, and in some synagogues women, wear head coverings, and those who are not Jewish should consider wearing one as well as a sign of respect. Guests may also be offered a talit, or prayer shawl, but may decline if they are not Jewish or feel uncomfortable wearing one.
Depending on how traditional the community is, guests may be expected to wear very formal clothing. Those who are not sure can contact the hosts of the Bar Mitzvah for advice. In addition to dressing appropriately, guests should respect the sanctity of the service and turn off all electronic equipment.