US Chambray shirts, used by the US Navy. These appear to all be the type 2 or 3. They are light blue, and perfect to camouflage in the open ocean. 

Most of these will feature a name tape, while some have it stenciled on. The have two breast pockets so you can carry your special items. 
 
These are all in good condition, but please expect some small stains, small holes, tears, and/or markings. Otherwise, these are ready to be worn out of the box.