I have used the Korkers Guide boot for several years, and I really like these boots. When wading boots get wet, they loosen up, and with the BOA system, all it takes is a couple quick turns on the adjustment knob, and you're back in business! The threat of Aquatic Invasive Species (AIS) to our cold water fisheries is formidable, and the Korkers Guide boot with its interchangeable sole system provides the option of using the rubber or studded rubber soles which are easier to clean and faster to dry. Stop the spread of aquatic invasive species, and practice the clean angling techniques to Inspect, Clean, and Dry fishing equipment and to avoid moving fish, fish parts, plants or water between drainages.