watermill

Hello ! I would like to hear your opinion about my understanding of application of Windstopper fleece jacket. If you wear Windstopper fleece jacket then you should have ordinary (Polartec Thermal Pro High Loft, or similar) fleece jacket in your backpack in case weather get really cold and wet or snow storm is coming, so that you can change your Windstopper jacket to Polartec fleece jacket and use it as a middle shell in combination with a hard shell jacket. Is my opinion correct ? Thank you. P.S. I'm talking about weather conditions in Alps region.