We will be cruising on the Island Princess early September out of Whittier. Today, I was looking through the Princess web site and found the gift shop offerings. We are interested in the reversible fleece coat but nowhere to be found were available sizes and the weight of the jacket. Is this something to replace any jacket we would bring or is it just a lightweight supplement.? I'm tempted to order one but without a list of available sizes, I can't do it. One size fits all doesn't hack it. I assume it will be available on board ship.