The castelli sorpasso cycling bib tights have been getting glowing reviews from magazine testers all over the world and are a favorite among the castelli test crew the comments that keep coming up are the great fit along with exceptional comfort down to very cold temperatures or even when the thermometer rises the secret to the great fit of these castelli bib tights is the mixture of thermoflex core due along with castelli39s standard thermoflex that lets them create just enough stretch bu