The Castelli Free Aero RC Bib Tights are cool or cold weather all-rounders, designed for maintaining a comfortable temperature, providing some protection from the elements and feeling great against your skin. They're made from soft, warm and stretchy Nano Flex 3G fabric from waist to knee, which is highly breathable. It furthermore keeps out much of the wind and lightly repels rain.   The two areas with different fabric are the lower inner leg, which uses a lighter, even more splashproof Nano Flex material, and the bib straps, constructed with an open weave and narrow coverage for maximum airflow. There's also a small pocket at the foot of the straps, just large enough to hold a gel to keep you going.   The leg endings are simple and low maintenance, being raw cut and stretchy, so that they don't need a zip or grippers that might interfere your shoe covers on a puddle-filled route. Meanwhile, reflective tabs on the back of the legs, both at the ankles and thighs, will help keep you visible when the light fails.   Comfort-wise, these tights are built around Castelli's best seat pad, the Progetto X² Air Seamless. Constructed with two densities of foam and gel pads that absorb vibrations, not to mention a soft upper layer that moves with the skin, this pad offers superb long-distance comfort.   Made with long training rides in mind, the Free Aero RC Bib Tights will ensure that, however long you're out cycling for, you'll feel great throughout your route, even if the weather isn't as resilient as your enthusiasm.   Features: A focus on comfort and warmth makes this your first-choice cool weather bib tight. Build around the pro-level Progetto X² Air Seamless pad, for all-day comfort. Made from Nano Flex 3G material, with a brushed fleece lining, light wind and water resistance and ample stretch. Inner lower leg from light Nano Flex stretch woven fabric, with leading splash resistance. Stretchy, raw cut leg ending means no zip, therefore better shoe cover compatibility. Features minimalist, low bulk bib straps, with rear pocket at the foot. Reflective tabs at back of legs. Weighs 279g (medium size). For use at temperatures from 2-12˚C, 36-54˚F.