The Muck x Bone Collector Men's 15" Fieldblazer Boots is built for wet, cold, and uneven terrain where dependable protection matters. 5mm neoprene bootie adds flexible comfort and performance, while breathable mesh lining improves airflow inside the boot. bioDEWIX footbed topcover uses NZYM for odor and moisture control; Self-cleaning calendered outsole grips mud, snow, and dirt.