What is the best air filter protection for sand and water?

When looking at air filter prefilters i see there are offerings specifically for wet application, for sand, and for dust. On the Northcoast we have a lot of sand (beaches and dunes and a lot of trails nearby with bits of sand as well) Not a lot of dust as it's usually pretty damp round the redwood forest but that brings me to the engines next enemy.. moisture. If the humidity is high all the time, would it be adventageous to run the rain cover?

I'm so confused by all these options lol. If you're riding sand and the humidity it hovering around 80%, which prefilter would do best at protecting against both?
I like to believe the filter and it's oil does a good job in that closed up airbox but I want to protect this engine as best I can, especially if I ever wanna open up some holes in that sidecover.

Thanks for reading, Peace.

Disposable hairnets oiled up!

No sand here, but 3 months of drought and was extremely dusty this summer. Did a race down state and visibility was less than 10' when in the pack. PC filter skins with NoToil work great for me.

Those look like very good filters

I got 3 of the DT-1 triple layer foam filters for sand and mud coming in the mail. I usually use noToil oil. I like the hairnets idea lol, also Filterskins look like a cool product. thanks for the ideas guys!

water, in the form of humidity, is not a problem at all. Set up your filter for a dusty SoCal ride.... being on the Humboldt coast just means you won't hafta clean your filter as often.

Good luck with the DT-1 (i'm old-school enough where that name almost bugs me; hell, I own a DT-4). I'm a Uni fan, but on Italian huskys I think TwinAir did a better job.

Interesting that the NoToil filter did better then TwinAir! I'm just about to order up a couple of new filters. Thanks!

I use motul filter oil mega sticky and have to clean with solvent, would steer clear of no toil in very dusty conditions esp if riding a 4t.

Iv always bn a staunch user of motul but tried the Fuchs silkolene from SCA n gotta say its pretty good! Runny like water but goes tacky AF!

KTM/Husky factory use Twinair filters sometimes with the Twinair add-on sand prefilter. But there are many choices out there.
http://www.twinair.com/

http://www.twinair.com/air-fuel-oil-filtration-products.html

scroll down and look at the dust add-on filter, double your pleasure.

many of my friends and myself have used this PC1 product for silty stuff . Ive never used the quick release tab pull set up but I know folks who have.
http://www.pcracingusa.com/FilterSkins_c_18.html

This is such a simple thing that works pretty darn good.

I've been using the PC Racing filter skins on our two KTM 690's with the Rottweiler Air Intake System. This system uses a big elonggated foam filter. When we were down in Nevada with flour dust last summer, I put two layers of the skins on the bikes. It was really dusty, when we got home after two weeks, I changed the skins like three or four times, nothing came out of the Rottweiler main foam filter.
I've been using oiled hair nets over the TE511 filter - it is a weird size - seems to really help there as well.

This is something I will keep using for sure.