The "Class A" uniform is the Boy Scout version of Full Dress Uniform. The following is an excerpt taken from the 11th Edition of the Boy Scout Handbook (pages 12-3).

Explanation of the Uniform

"The complete official uniform includes the Scout long-sleeved or short-sleeved shirt, Scout pants or shorts, Scout belt and buckle, Scout socks or knee socks. A neckerchief and cap or campaign hat are optional."

"Class A" uniform should also be worn with dark colored shoes or boots (black or brown are the preferred shoe colors). It may also be helpful to wear a Scout-related T-shirt under the "Class A" shirt so that you can easily convert your uniform to "Class B" if necessary. The only difference between "Class A" and "Class B" is the shirt.

When to Wear "Class A"

"Wear full uniform for all ceremonial and indoor activities, such a as troop meetings, courts of honor, and most other indoor functions. The uniform should also be worn during special outdoor occasions, such as Scout shows, flag ceremonies, and special times at summer camp."