What kindof clothes should I bring to an alaskan cruise?

Ren asked:

My family and I are planning to go on an alaskan cruise in our near future, sometime during long breaks. We’ve decided that during summertime would be the best time.

For those that have already experienced this type of cruise to this particular destination, would there be any suggestions as to what type of clothes we should bring? We don’t want to pack any winter clothes, but if that’s what’s needed, then we will.

Please remember, we are going on this cruise during the summer, therefore, its also summer in Alaska.

Thank you very much.