It is built as a rain jacket: the smooth woven shell is designed to shed water and block wind, and it handles light-to-steady rain well on walks and commutes.
Based on the product details, the fit appears relaxed through the body with a drawstring waist you can cinch, so your usual size should layer comfortably over a sweater. If you are between sizes, the store's size guide is the safest reference.
The hood is attached at the collar and adjusts with drawcords so you can snug it down in wind.
Machine wash cold on a gentle cycle and hang to dry — it keeps its shape without ironing.
Yes. The plaid lining shows inside the open front, inside the hood, and on the cuffs when you turn them back.