Answer
Oct 11, 2022 - 06:39 AM
Hello. The side panels are a lighter weight and very breathable fabric. They don't have zippers and they don't open up, but the panels are just more breathable there in the high moisture areas then the front and back of the jacket which are windproof and less permeable.
I hope that this helps but please let us know if you have any questions at all: 1-800-783-8326 or cyclewear@aerotechdesigns.com.
Thanks!