Women's Gortex Performance Shell Cycle Jacket This Performance Shell Gortex jacket has a detachable hood, pit zips for ventilation, side and chest pockets all with waterproof zips. Attached to the inside rear of the jacket is a mud skirt that can be dropped to keep your backside clean and dry when cycling in adverse conditions. When not in use the skirt clips away out of sight. The material in the jacket is top of the range Gortex that will keep you 100% dry and warm during the colder, wetter months.