The Storm Bib with Sherpa Fleece Lining is not your typical hunting gear. The heavyweight, high-pile sherpa fleece lining creates warmth without the bulk of traditional insulation, making them more comfortable in the field. HyperShield 2.0 technology ensures 100% waterproof/breathable protection from the elements. One of our favorite features is the full-length side zippers that allow you to unzip both sides of the bibs and remove them without pulling them off over your boots. This is a great feature if you get hot and need to take the bibs off while in a treestand, or if you get them muddy and need to remove them before getting in your vehicle.