Servus 12" Blue Knee Boot Servus 12" Blue Knee Boot features a 100% waterproof high quality premium rubber construction with comfortable fabric lining for easy and off. Ideal for wearing on boat decks and other wet surfaces or where a no-scuff boot is required. These boots have a snug fitting ankle design with removable, washable, lightweight insole and the "Deck Grip" outsole provides excellent traction on wet surfaces while non-marking.