Not all glass is created equal. Your home windows are usually single-pane or double-pane and offer little to no UVA protection. That sunny spot by the window where you read? Yeah, your cat isn’t the only one soaking up rays.
Car windows are a bit different. Most car windshields are made of laminated glass, which actually blocks a significant amount of UVA (like 96%). But your side and rear windows? They’re usually tempered glass, which is a UVA welcome mat.
So, if you’re a passenger on a long road trip, your face and arm are getting a nice dose of window-drama. Pro tip: If you’re driving, the side window is your skin’s worst enemy. Roll it up and slap on some SPF—your future self will thank you.
