WARM AND DRY: The boots are made of waterproof vulcanized rubber and have neoprene lining to keep your feet warm and dry even during heavy rain. ULTRA GRIP: Simms proprietary rugged deck outsole provides the shoes’ grip and traction on all surfaces and in a variety of weather conditions. RIGHT ANGLE: Right Angle Footbed provides protection and comfortable underfoot ride and aligns the foot into a neutral position, while a structured heel cup aids in the body's ability for natural shock absorption. NON-MARKING: The non-marking, siped outsole ensures maximum versatility across on-deck and in-river performance, while the pull-on loop makes it easy to put the shoes on and take them off. SIMMS GUARANTEE: If your Simms product fails due to a defect in workmanship or materials, let us know to repair or replace your gear and get you back in action as soon as possible.