Sun exposure after Fractional CO2 Laser - do I need to use an umbrella in addition to hat and sunscreen?

Heellpp! I'm in Thailand, and my skin care clinic offered very contradictory information. After fractional CO2 laser (not full face, just a few areas with wrinkles), if I want to go outside during the day, do I need sunscreen, hat, and umbrella? Or just a hat and sunscreen? If I do need an umbrella in addition to a hat and sunscreen, after how many weeks can I safely stop using the umbrella? What about sunlight coming in through the windows? The sun is very strong here in Thailand. Thanks!