Love having these filters on hand when cleaning the original filters that came with my Shark Ion IF282. They dry for 24 hours which is too long for the vacuum to not chase my kids. While these replacement filters aren't as perfect as filters, I have no problem using them. I was actually quite surprised when I first used them and collected so much dust and dirt. I could see the difference in a new, clean filter versus dirty filters that were in dire need of cleaning. I recommend them because they work very well and are pretty cheap.