Cotton or cotton blends are your best bet. They offer breathability for comfort and a crisp look for a polished appearance.

For formal occasions, solid colors are the safest choice. For interviews, light blue or white shirts with a conservative tie are ideal. Navy shirts can work well with bolder patterned ties.

Always follow the garment care instructions. Proper washing and ironing are key to maintaining the shape and crispness of your formal shirts.

It depends on your office culture. If unsure, opt for conservative patterns. Stick to solid colors for a more formal look or important meetings.