Amassing a cycling wardrobe for the cooler months can be a daunting affair. With all of the different choices and possibilities you need to prepare for, it can also be a bit spendy. We don't always have room in the closet or the budget for all the precisely specialized gear that we'd like, so items like the Pearl Izumi P. R. O. Thermal Bib Shorts are among the first pieces of cold weather kit that we pick up as the seasons change. The P. R. O. Shorts use Pearl Izumi's Thermal fabric throughout their construction. Thermal is recommended for temperatures between 40 and 60 degrees Fahrenheit, so it slots in as the cool weather option in Pearl's clothing line. The difference between it and the cold weather gear, PI Softshell, is that the latter incorporates wind and water resistant fabric. The Thermal fabric focuses solely on warmth and is more breathable than the Softshell. If you don't plan on riding in torrential downpours and you layer to protect against wind, then the Thermal is your ideal choice. Since they're shorts, the P. R. O. Thermals offer you the opportunity to wear them alone for cool days or add leg or knee warmers on a ride when the temperature drops. As one of our resident bike gurus puts it, warmers afford you more real time layering opportunities. If you overheat on a climb or during hard intervals, you can quickly slip them off. This is in stark contrast to full length thermal tights, where the only option is ungracefully folding the bottoms up over your lower legs where they then flap about in the breeze. The shorts include Pearl's P. R. O. Anatomic 1:1 Chamois, which has a varied geography of light foam density ranging from 4 to 13 millimeters. Its seamless construction is unobtrusive with no abrupt edges or goofy little designs, just the right amount of support and comfort where you want it. In an industry that often thrives on extravagant design, the 1:1 insert is refreshingly minimalist and effective. The Pearl Izumi P. R. O. Thermal Bi...