What can I wear to protect my knees?

Hey all. So I have recently started playing slow pitch softball a lot and I apparently find myself sliding a ton. But the bad part is I constantly keep scraping the crap out of my knees whenever I slide. Is there any sort of knee protectors I can wear that can protect my knees from getting all torn up? I tried searching and I can’t find much that fits this specific issue. If someone can lead me in the right direction I’d be very appreciative. Thanks