Muck Boot Men's Artic Pro Hunting Boots, Fleece Liner, Waterproof fight the wettest, coldest field conditions! The Muck Boot Company make waterproof Hunting and Field Boots that keep you in the field, rather than running home shivering! These Boots all boast: 5mm CR flex-foam bootie for warmth; 100% waterproof, light and flexible. Coated with a multi-reinforced tough rubber shell The shaft is wrapped in 4-way stretch nylon; High-abrasion rubber outsole is long-wearing with sure traction; Breathable Airmesh lining lets air circulate, wicking away excess humidity and perspiration; Protective reinforced toe with a wrap-up bumper, plus Achilles back overlay; Molded EVA cushion midsole, contoured footbed; Stretch-fit binding at top fits to calf to keep cold out and warmth in. Extra-thick 8mm CR flex-foam bootie adds warmth; 2mm thermal foam underlay in instep area; Comfort range of -60 degrees F to 40 degrees F, depending on activity level. Each approx. 17"h., 35 ozs. State Size. Medium width. Half sizes, order the next larger full size.