For demanding outdoor conditions, the Muck Women's Muckster II Mid Boots combines waterproof coverage with stable, supportive construction. 4mm Neoprene Bootie for comfort and performance, while breathable mesh lining improves airflow inside the boot. bioDEWIX footbed topcover uses NZYM for odor and moisture control; Self Cleaning Rubber Outsole Built for the Lawn and Garden.