I used to wear this when I went on business trips to Okinawa Prefecture. I wore it once or twice a month during the summer for two seasons. I haven't worn it since this year as I no longer have the opportunity to go. Material: 100% cotton No damage to the collar. No holes or stains that I can see, but there may be some overlooked. Please understand that this is a used item before purchasing. Please check my profile before purchasing.