It's a very light material and seems to be well ventilated. I think I will use it often. Hello. We sincerely thank you for leaving your valuable review. Your valuable opinion is of great help to us. This model is a steady seller among Sunday Afternoon hats and is loved every year. I don’t think you will regret your purchase! We will issue you a personal discount promo code that you can use on your next purchase. Please check the bell notification via SMS or app on My Page. Thank you again. Have a nice day ^^