Class B Uniforms are the official unofficial uniform for Pack 740. While they are not required, they are very nice to have when doing a activity that involves any chance of getting dirty. The sweatshirts are also very nice in the winter time. The youth small shirt are very small. I would recommend at least purchasing a medium for the younger scouts. if anything they will have to grow into them. The t shirts will be gold with Navy lettering and the sweatshirts will be navy with gold lettering.