Grundens Weather Boss Work Wear Pants. Black, Size XLarge. We developed the Weather-Boss garments to address the growing need for Grund ns quality in other types of protective clothing. The fabric is a 500 denier nylon that is coated on the inside with a waterproof breathable barrier. This fabric is waterproof to 10,000 mm and breathable at a rate of 5,000 mvp. All seams are taped to eliminate water intrusion through stitching. - This hard working pant features easily removable elastic suspenders, two handwarmer pockets with zipper closures and two cargo pockets with Velcro closures. The double reinforced knees have a slot to accept the Grund ns foam kneepads (sold separately). There is an internal gaiter for a snug fit