Austrian lightweight BDU service shirts. These are made from a 50/50 blend of cotton/poly making them lightweight and comfortable. They feature 2 breast pockets and most that I have seen still have the patch on the sleeve. Many will come with velcro strips to apply any patch you may want.
These will make really good hiking or work shirts.
 
Since these are used, please expect some wear, small tears, and missing buttons. Otherwise, they are ready to go.
 
Sizing! I normally wear a size small, and these fit well but if you are looking for a more loose fit, I suggest choosing one size up to allow for more room. If you have questions about the sizing, feel free to ask.