Perfetto by name perfetto by nature it was the castelli pro riders who first asked for a gabba thatrsquos not as hot as the gabba but warmer than the perfetto vest so with the gabba as a starting point castelli have made the back in nano light fabric the same fabric as their nano flex tights but without the brushed fleece inside this gives the piece a lot of breathability and keeps you from overheating inside by using a lighter weight of windstopperreg a full 25 light