All the best technologies have been put into the castelli sorpasso womens bib tight the progetto x air womans specific seat pad and a mix of lightweight fabrics including the warm thermoflex core2 by applying the technical advancement of hollow core fibres castelli have made these bib tights not only lighter than your normal bib tights but also warmer and they keep you drier ankle zips are ykk camlock and covered with reflective tape for night visibility now youre ready to put in tho