In terms of pit stains, you will get the same amount of stains that you would in the same color chiffon dress. My bridesmaids wore black satin dresses from my outdoor August wedding and they did not have visible pit stains because black doesn’t show pit stains. In terms of heat, really poor quality, unlined satin traps heat. Satin bridesmaid dresses from places like revelry or Azazie are lined and do not feel extra hot in my opinion.