Go for a simple but at the same time neat and relaxed look by pairing a grey long cardigan and a crew-neck t-shirt. Why not add burgundy suede loafers to the equation for an added dose of style?
Grey Long Cardigan with Crew-neck T-shirt Smart Casual Outfits
If the situation allows casual styling, you can dress in a grey long cardigan and a crew-neck t-shirt. Balance out your outfit with a more sophisticated kind of footwear, like these dark brown leather loafers.