The Entrata Bib tight reflects the same obsessive drive for function, comfort and performance seen in all of Castelli's tights, combined with fabrics and components that were top of the line a few years ago. The Thermoflex fabric was considered a breakthrough, the best you could get, until a decade ago when Castelli developed Nano Flex and added water repellency. If you don't ride in cold, wet conditions you'll appreciate the luxurious warmth and stretch of this fabric. The tight has minimal seams for comfort, and the KISS Air2 seat pad features generous padding and quite possibly the softest surface fabric in the business. It's everything you need to comfortably enjoy dry winter rides.