Assos has a whole arsenal of different weaponry for the war on cold weather, including no fewer than seven levels of graduating protection. The LL. bonKa Bib Tights are the option for winter, using the same insulating RX materials as other entries in Assos' line but with added windproof and water resistant properties. The only Assos bib tights with a warmer rating are the LL. fugu, but we'd argue that the LL. bonKa are a better option because they don't include an extra layer of insulation on the torso, giving you more control over your layering. This flexibility is further highlighted by something missing in the LL. bonKa: a chamois. Since the bib tights have no insert, you're free to use your favorite summer shorts underneath or even run them chamois free. Assos suggests that they can also be used for cross training, but the cycling specific cut and articulation throughout their construction means they are best suited for use in the saddle. Since this is Assos, you know you're getting into some serious RD. The LL. bonKa Bib Tights incorporate panels of a four way stretch, windproof, and waterproof material called stratagonUltra, which is windproof and according to Assos borderline sentient. While we think it's a bit much to claim that the material has agency, it does adapt to your microclimate's condition by dilating. The cold causes the fabric's membrane to close up for full protection from the elements. As you warm up and start to overheat, the membrane opens, increasing breathability and regulating temperature. Three other fabrics make up the LL. bonKa's construction. RX and RXPlus are spread throughout in a strategic pattern to maximize protection and breathability as appropriate. The brushed inner lining wicks moisture while insulating, so you'll stay warm and dry. The material is doubled up over the gluts, which Assos refers to as your power machine. A panel of stratagonLight is placed over the lower abdomen, which Assos claims reduces the nee...