If it's ease and functionality that you're seeking in a look, go for a pea coat and shorts. For shoes, go down a more classic route with a pair of navy leather loafers.
Pea Coat with Shorts Smart Casual Chill Weather Outfits For Women
Combining a pea coat with shorts is a great idea for a relaxed casual ensemble. Balance this ensemble with a more sophisticated kind of shoes, like these black suede ankle boots.