Muck Boot Chore Cool Hi Boot Chore Cool Series - Work Boot: These classic Muck work boots feature the new comfortable XpressCool moisture removal lining material to keep feet cool and dry in the summer. The Muck exclusive shallow Vibramoutsole keeps the wearer secure on laddres and surefooted on wet, concrete surfaces, all with a shallow lug that efficiently shed mud and debris. It is wrapped in hand laid rubber and the uppser uses Spandurafor resistance to briars and tears. Comfort Range: 40F to 95F. Rugged Spanduraupper. XpressCool lining. Triple toe and quadruple rubber heel reinforcement. Steel shank. 4mm CR flex-foam. Color: Brown Size: M8/W9