Good ventilation has been designed into lightweight warm fabrics used to make Castelli’s Prologo Jacket. The construction of the Castelli cycling jacket will keep you dry as you ride your bike up a mountain road and then block wind as you descend. On the ascent, the highly ventilated Warmer fabric on the back pulls out sweat and body heat. On the descent, the Gore-Text Infinium Windstopper X-fast fabric blocks wind. The Gore-Text Windstopper fabric is a truly windproof fabric that also allows sweat to escape. Made with billions of pores 900 times larger than water vapor molecules, wind can’t break in, but moisture can get out. Additionally, a water repellent treatment is applied to the outer fibers so water rolls of. Less water accumulation means less windchill and less weight. Three easy to access rear pockets have a reflective panel below the pockets making you more visible to motorists on low lit morning rides. The YKK® Vislon® zipper is easy to open when you need a little extra cooling air as you ascend the mountain road.
