Few names inspire the confidence of Gore Tex, whose Windstopper fabric provides the basic protection at the top end of virtually every manufacturer of cycling clothes. Gore Bike Wear's own Xenon 2. 0 SO Bib Tights are no exception to this rule, and the combination of fabrics, cut, and the Xenon chamois make this a pro level pair of bib tights for the most dedicated high mileage, cold weather cyclists. The Xenon Bib Tights live up to their namesake's nobility, which is only fitting as Gore is the king of cold weather protection. As with all Gore clothing, the star of these tights is the fabric. They incorporate three layers in a build more akin to a 2. 5 layer construction: an outer shell, a Windstopper membrane, and a lining. In this cycling sandwich, the two pieces of bread protect the Windstopper so that it can protect you by keeping you warm, breathing to transfer moisture and prevent overheating, and fending off the elements. The Windstopper panels are used on the front of the legs and around the crotch, protecting the parts of your body that lead into the wind. The back panel has a more flexible but less protective blend of materials, letting you move freely in the areas that don't need as much wind protection and ventilating well to dump excess heat. The Xenon insert is Gore's finest chamois. It shares the strategically varied thickness, the freedom of movement, and the ventilating properties of Gore's other inserts, but with an additional anti vibration element under the key pressure points. This means that it's its most comfortable chamois, and will ensure your comfort across five hours of cold weather base building. The Xenon's pedigree shows in their construction. They have pre shaped knees, foot straps, and shifted seams to make for a fit that's unrivaled in comfortable support and accommodating the pedaling motion. Gore also tapes the crotch seam to prevent abrasion in the area that sees the most contact, protecting your investment. The short front...