The insulating warmth and water repellent attributes of Castelli's Nanoflex 2 Bib Shorts are the ideal match for any of the new breed of windproof, rain resistant super jerseys based on the now legendary Gabba. Whether worn alone for a bit of fall insulation or to make rainy spring racing endurable or matched with a complementary pair of Nanoflex leg warmers for winter base miles, the Nanoflex Bibs are among the most versatile kit that we own. They don't quite have the second skin fit of bibs like the Free Aero Race shorts, but the benefits of a dry chamois over the course of a wet ride are impossible to overstate. The secret to the Nanoflex 2 Bib Shorts' success is hidden subtly in their name. They're made from Castelli's Nanoflex fabric, which is a water resistant version of Castelli's insulating Thermoflex fabric. Nanoflex is coated with millions of nanofilaments to create a water repellant surface, compelling rain and road spray to bead up and roll off the surface. Of course, the introduction of those nanofilaments doesn't interfere with Nanoflex's thermal properties, and the brushed interior not only keeps warmth in, but it also wicks moisture away from your skin. The Nanoflex Bib Shorts keep you dry from inside and out, because nothing puts the stop to a cool, damp base mile session faster than the accumulation of clammy moisture on your skin. The bib straps are made from breathable mesh that won't interfere with your upper body layering with patches of extra insulation, and compressive, gripping bands at the leg openings maintain water repelling coverage. The inclusion of Castelli's Kiss Air insert ensures a comfortable cyclist to saddle interface with a varying topography of breathable padding and a soft, bacteriostatic cover.