If we had a breaking news section, this would probably be breaking news. Best Buy just introduced a new family of filters - “Natural Density Filters“. You can get them right here.
So, this is obviously a typo (confused with Neutral Density Filters) and thing will resume to normal as soon as the Department Of Web Sites Categories gets their hands on this and makes a fix. (Hopefully, they will not have to throw all their stock of Natural Density Filters and replace them with Neutral Density Filters as throwing away so much stock can be quite expensive.
[Natural Density Filters | Best Buy. Thanks for the tip Simon]
P.S. If Best Buy says that they don’t carry this kind of filter, just point them to this screen grab.