I am facing a difficult situation wherein my client visit is due over in next week. We have a formal dress code except on Fridays. On this day, my boss asked us to wear a Company T-Shirt that is provided to all employees with no cost charged. However, based on my body fitness, I feel extremely uncomfortable in a half sleeved t-shirt.
I don't know how to deal with this situation, what reason should I give for not wearing the 'Team' dress? Also, I don't want to take leave on that day, because it is important to get versed and know more about the business.
I would also like to know what needs to be done in general. For example, I talk about technologies in conferences where similar requests about dress code (half t-shirt featuring the company's product) are also there.
Update: Thank you all so much for overwhelming response and considering my situation, I feel more confident - Underneath long sleeve T-shirt or jacket is solution for now. I hope management and more people start considering the preferences of the individuals across the world.