This three in one system give the rider options for all conditions. Start out the cold morning, with the liner and the shell keeping you warm and riding. As the day warms up drop the liner off at the car and keep your look the same. If its really toasty loss the shell and just run the quick drying street style hoodie. With these option all in one you never have to worry about what the conditions are going to be like up in the mountain.
This jacket makes up for the unpredictability of you local weather person.