I figured a cheaper filter might not last as long as a real one, but wanted to save a penny. Not a smart move. This filter is made of hard plastic as opposed to the flexible paper you find in real i-robot filters. It doesn't make him stronger. It just blocks airflow so Roomba can't even do its job. When using these filters, the "basket full" indicator was lit, but the bin was always empty. It turned out that dust and pet hair accumulated on the reels and never ended up in the trash. Instead, the machine left caterpillars all over the house. I honestly thought my Roomba was broken. SUPER LOVED so I finally broke down and bought real filters. The results improved immediately. Don't buy this. You will regret it too.