Not all cyclists prefer shorts with bib straps. Because of this, Castelli offers most of its race ready shorts in bibbed and non bibbed versions. The Volo falls into the training category for Castelli, which is pretty much race quality for just about any other manufacturer. The Volo is made with a blend of Affinity Lycra and Affinity BLC fabrics. Both of these fabrics offer a high amount of stretch and aerodynamics with lightly compressive qualities to fight fatigue. The Volo also gets Castelli's Giro Air leg band, a wide strip of stretch material that keeps the fit secure without binding or wearing off after a few washes.For the insert, Castelli chose its KISS Air chamois. This is a low profile chamois, designed to reduce bulk. Most of the dual density padding is relegated to the ischial zone, while the perineal area is protected by a pressure relieving channel.