A white horizontal striped crew-neck t-shirt and navy chinos are totally worth adding to your list of bona fide casual essentials. Inject a more relaxed spin into this ensemble by finishing with a pair of black and white athletic shoes. This outfit is a tested option if you're searching for a great, summer-appropriate outfit. Those who wonder whether you can still pull off modern casual outfits as you head into your 50s, this combination should answer your question.