This combo of a white and navy gingham long sleeve shirt and navy skinny jeans gives off this laid-back and approachable vibe. And if you wish to immediately perk up this outfit with one single item, why not introduce a pair of grey suede low top sneakers to this look? If you feel uninspired by your autumn fashion options, this outfit just might be the inspiration you need. Wondering how to nail casual dressing as you drift through your 20s? This combination is an amazing example.