Why do you ask for t-shirts free of logos and only particular colors?
Black and brown t-shirts can be worn under uniforms, logos prevent the wounded from being able to layer under uniform and be in regulation. Many do not like to be walking billboards and with having logo’s across the t-shirt it says “We Are American”. Our troops are on foreign soil and we wish to keep them safe and have them blend into the environment. Dress attire for Germany is more conservative and American logos put a target on our military member’s chest.