A white and navy horizontal striped crew-neck t-shirt and navy chinos are the perfect foundation for a casual and cool look. Add grey athletic shoes to the mix to instantly amp up the fashion factor of this ensemble. Seeing as the weather is getting chillier with each day, this getup seems a smart option for the time in between seasons. Wondering how to master casual dressing as you head into your 40s? This pairing is a good illustration.