When you need to go about your day with confidence in your ensemble, wear a multi colored plaid long sleeve shirt with a white crew-neck t-shirt. A nice pair of beige canvas slip-on sneakers is a simple way to give a dose of polish to your ensemble. This outfit is a fail-safe option if you're searching for a great, summer-ready outfit. This pairing is a great inspo to anyone who wasn't sure about wearing casual clothes in your 40s.