The Professional products in the Viking series are constructed of Trilobal Rip-Stop polyester, which creates high quality outerwear for the working Professional who has need of an extra-tough duty garment. Trilobal Rip-Stop Polyester offers superior abrasion, rip, tear and snag resistance versus fabrics almost twice its thickness. It is constructed of triple- twined Polyester thread, which creates cross-sections of fibers, forming tiny cells that increase the cut and abrasion resistance of the garment, while effectively stopping any rips and snags from spreading to the next cell. These Professional THOR pants are extremely heavy duty: Each seam is fully taped and heat sealed, as well as being triple sewn for extra durability. In addition, these bib pants have double layered knees with a knee pad access/drain hole, seven assorted size tool pockets (with rivets on corners for strength), tool loops and pen holders, as well as a 15" boot zip with Velcro cover for ventilation and easy boot access. These bib pants come with heavy duty elastic suspenders. Feel confident when standing up against the elements in your Viking Professional THOR pants.