Travel clothing should first of all be comfortable and appropriate for the weather and location. Pack only clothes that you like and maybe some new additions that you bought especially for the trip. Don't forget about a more elegant look that you might want to wear for a night out, or a special date.
Organic, natural fibers are a great idea, so you should consider them first. Even if you are going for a hot destination, try to pack some warmer clothes too. You never know when may you need them.