I've been using tennis shirts/pants made of dri-fit and find no reason to go back to cotton. Dri-fit remains drier and lighter than cotton. Recently, I also purchased a tennis cap made of dri-fit too, which I didn't know existed, and just love it. I think it could be personal preference, but is there any reason to wear clothing/caps made of cotton when synthetic dri-fit seemingly affords so much advantage in terms of dryness and weight over cotton? Any thoughts?