Ordered this thinking it was OEM. Upon opening, I highly suspect it is NOT. Slight differences, like the Dyson OEM filter has a sticker with washing instructions on the inside. The folds also seem slightly smaller. Disappointed because I thought it was OEM. Next time I will order directly from Dyson, except this filter was out of stock on Dyson.com. It'll work for now but I'll replace it directly from Dyson when they come back in stock.