Well, I have thought about all your responses and most of them make sense. I was still puzzled why the coat was so moist on the inside when I really didn't perspire that much. So I decided to call Filson.
I talked to 2 of their customer reps. One who answered the phone (Shelley) and the manager at the time. When I told them what I was using the Tin coat for (hiking in the rain for a few hours) they suggested that I try the Cover Cloth material. They stated that Tin was for working and toughness/durability was its main strength, not water resistance and breathability. They suggested that I return the coat for an exchange.
I sent it back last week and spoke to the exchange rep today. His name was Dave. Dave asked me what I was using the coat for and he said that I should try another brand. He said that none of the Filson water resistant material would breath and would not be appropriate for what I was doing. I decided to exchange the coat for a Medium Field Bag and scarf. All in all, I am very satisfied with Filson's customer service. They were very helpful and asked me a lot of questions. They were upfront with me and honest about the capabilities of their product. I have learned a lot about their products during my conversations with them.
I still have a Tin coat (waterfowl/upland) that I will use for outdoors work, a Double Mac for the cold stuff, and a Seattle wool bomber for everyday wear. I guess I stick with my Gore-Tex for rain wear and hiking.
Thank you all for your feedback and advise.
S.