(Muck Boot Company) An all-condition work boot. Comfortable Xpress-Cool lining material keeps your feet cool and dry in warm weather. An added material, Spandura, is wrapped to the exterior of the neoprene for added protection against wear and abrasion. Made of 4 mm “CR-Foam”, 100% waterproof, light weight, and flexible. Comfort range of sub-freezing to 95 degrees.