Warm Wide Calf Rain Boots. These boots have a warm stretchy neoprene upper to keep your legs warm and expand to fit your curves snugly! They still reach 20 inches in the calf and are extra wide in the foot and ankle. The neoprene upper is fully waterproof and provides a lovely layer of insulation to keep your legs warm in chilly conditions - perfect for when you are out walking the dog in the fall.