Ketchikan tennis shoe
n.— «One of natural wool’s greatest attributes is one of its greatest weaknesses: It absorbs moisture without losing insulating value. This makes it perfect for something like socks in rubber boots or, as they are called in Southeast, “Ketchikan tennis shoes.”» —“Wool vs. synthetics” by Craig Medred Anchorage Daily News (Alaska) Jan. 13, 2008. (source: Double-Tongued Dictionary)