You are looking at a beautiful COLUMBIA PFG yellow mesh lined short sleeve button up fishing/outdoor shirt in size Large in very good condition.  Despite the stated size being a large, the measurements certainly allow for an extra large fit or a very relaxed large fit.  Columbia PFG's can run larger than stated due to their relaxed fit for maximum outdoor performance.  The upper back is lined with mesh and vented for better comfort in warm weather or performing activities.  Being a PFG, it has all the pockets, loopholes and other detail that comes with it.