Lightweight, neoprene waterproof shoe. Self cleaning, multi-ribbed tread. Reinforced toe. Lightweight & fleixble. Easy to slip on & off. AIRMESH - Thousands of tiny vertical fires allow air to circulate throughout the interior surface. Excess humidity and perspiration are quickly wicked away, creating a comfortable environment for your feet. Stretch-fit topline binding snugs calf to keep warmth in and cold out. Neoprene Bootie. Comfort Range - SUB FREEZING to 18C