You really can't go wrong with a great knit sweater. Wear it on its own or over an oxford and you'll look like a million bucks. Taylor Stitch's Whaler Sweater is one that's an instant classic updated with a more modern fit and made from a heavy cotton 4-gauge knit that is manufactured in Massachusetts where its been knit for the past 104 years. Available now in Ash or Navy.
$98 (presale), Taylor Stitch