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  • Smith - Knowledge OTG Turbo Fan Goggle - Black/Blue Sensor Mirror/Xtra Lens Not Incl.

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  • Smith - Knowledge OTG Turbo Fan Goggle - Black/Blue Sensor Mirror/Xtra Lens Not Incl.

Smith Knowledge OTG Turbo Fan Goggle

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Free 2-Day shipping on orders over $50*

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    • Black/Blue Sensor Mirror/Xtra Lens Not Incl., One Size
      sale $112.00

    14 Reviews


    Get a goggle that actually works with your glasses.

    Squeezing a regular-sized goggle over your prescription eyeglasses isn't ideal, and neither is the fogging that inevitably ensues. The Knowledge OTG Turbo Fan Goggle uses a fog-eliminating, two-speed fan and Smith's 'Over-The-Glasses' large design to ensure that you see every little terrain flaw, drop-off, and fellow snow-slider with reliable clarity no matter how hard you push your skills.

    Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.

    • Floating foam membrane means you don't suffer pressure at your temples
    • Two-setting, micro-electronic fan on the top of the frame circulates fresh air and draws moisture out for ultimate fog reduction—run the low setting in normal conditions, then crank it to high during a backcountry tour or heavy pow-sesh
    • Carbonic-X lens with TLT Optics offers unmatched clarity thanks to the tapered top and bottom rim and impregnated anti-fog technology—less distortion and moisture build-up equals a safer day on the hill
    • Vaporator Lens Technology uses a dual-layer lens with a Porax Filter to keep the moisture out and prevent fogging
    • Urethane frame flexes with each facial movement to enhance comfort—shape seamlessly fuses with your Smith helmet
    • DriWix dual-layer face foam features a soft backing layer at the frame and a supple fleece lining against your face to absorb sweat and wick it away
    • Small battery pack on the side of the strap keeps weight near the goggle frame
    • Silicon backing keeps the adjustable, quick-clip strap stuck to your helmet or hat
    • Compatible with the ODS2 prescription corrective eyewear solution kit (sold separately)—snaps into place on the bridge of goggle frame for a seamless fit
    • Soft, microfiber bag included
    • Item #SMI0919

    Tech Specs

    Turbo Fan, top vent
    Helmet Compatible
    Eyeglass Compatible
    yes, over glasses, Smith ODS2 eyewear system
    Face Size
    medium to large
    Recommended Use
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    worked OK in most conditions but...

    • Familiarity: I've put it through the wringer

    These goggles worked OK but the power cord between the battery pack and the fan mechanism completely broke in less than a year. Also, the battery closure slide "door" on the battery pack had a tendency to open unexpectedly while using the goggle, sometimes resulting in the loss of the battery.

    Smith Knowlegde Turbo fan goggles

    • Familiarity: I've used it once or twice and have initial impressions

    Bought these to fit over my prescription glasses for skiing. The fan works great and keeps my glasses from fogging up. I did notice however when the batter pack gets moved the fan speed turns up or down. Not sure if its a short or what but seems to still work.

    Turbo Fan moves the Hot Air Out

    • Familiarity: I've put it through the wringer

    I am the rep for Smith goggles. First things first - there is no need for an anti fog paste. Smith lenses are made with our anti fog properties built into the lens and cannot be rubbed off. The reason a goggle will fog up (especially with prescription eyewear inside) is because too much hot air gets trapped inside the goggles. This is where the fan comes in. It will literally suck all of the hot out out of the top of the goggle. If by chance you are generating too much heat, pull the goggles away from your face and let some of that hot air out. Big people (you know who you are) can generate a lot of heat so always remember any goggle can fog. You just need to know how they work. If any consumers have a defective Smith Goggle, helmet or sunglass - we back up everything we sell with a lifetime guarantee against manufacturers defects. You can purchase Smith products with confidence knowing that we want to make your great days better!

    awesome and great price

    • Familiarity: I've used it once or twice and have initial impressions

    I wear glasses so i needed to get something that wont fog up and in my searches these came highly recommended, i have to say after using them i understand why, these are great, didnt fog up one bit and were overall super.

    Did not work as advertised

    • Familiarity: I've used it once or twice and have initial impressions

    I really wanted to love these goggles, but was so disappointed. I used the same anti-fog paste on my glasses as I have used in the past, and they fogged up worse in these goggles than my old ones. The issue is that they rely on the fan for airflow, and the fan is simply not powerful enough to make a difference. My glasses fogged up in these worse than my old OTG goggles. The difference is that my old ones simply have better airflow. The goggles themselves didn't fog up, but the turbo fan didn't help my glasses at all. Overall, a huge disappointment for $159, considering my old $50 goggles performed better.

    Just what I needed

    • Familiarity: I've used it several times

    In general, I actually enjoy wearing eye glasses, with the exception of when I am skiing. I have a few other pairs of goggles including the IOXs, which breathe really well, but even they do not do the trick all of the time. I tend to over heat in most conditions, so both my eye glasses and my goggles tend to be fogged up. Uncomfortable and potentially dangerous at best. Those who have to bear this cross know what I am talking about. I decided to pick up a pair of these this season and so far they have made a real difference. The fan is quite, the switch is easy to operate and the battery life seems to be good so far. I really like that you can turn the fan on when you need it and then turn it off to conserve the battery. The hi setting on the fan really blows out the moisture. I am looking forward to many seasons with these.

    2 Seasons Fog Free

    I've had the Knowledge OTG for 2 ski seasons and they've not disappointed me. You can hardly hear the fan, in fact a few times I've taken them off to confirm the fan is on. The only time I had a problem it was my fault for not leaving them out of the bag overnight to dry out. This caused them to fog up between lenses. I've hiked many backcountry trips here in the Wasatch Mountains and never remove my goggles. The Smith Turbo goggle models all are a huge plus when sending it on a powder day.

    2 Seasons Fog Free

    As advertised

    • Familiarity: I've used it once or twice and have initial impressions

    I burn hot on the mountain no matter what the temps. I usually ski in a tshirt under my jacket. The fan kept the goggles from fogging up. They were bigger than I thought, and with my K2 diversion helmet, the goggles pressed down on my nostrils a bit making it a little hard to breathe. I had to adjust the helmet to make it work. I think its me; i am bald and therefore the helmet sits a little lower on me, so it pushed the goggles down further than I'd like.

    They were good on a cloudy day, I wore my prescription sunglasses under them. no issues there and no wind or drafts on my eyes. the switch was east to operate even with gloves on.
    Overall very happy with them so far.

    Not a "fan"

    • Familiarity: I've put it through the wringer

    I have the old 2-battery version that I am nursing along. Much of the foam is gone, there's some duct tape involved. But they work great.

    As for the new 1-battery version, not so much. The fan is too weak, underpowered. The only way I get them to work is to stop breathing. I guess if I hadn't used the 2-battery version my expectations would be lower. Returned.

    Keeping The Fog Off & Visibility On

    • Familiarity: I've put it through the wringer

    I've owned the Turbo Fan goggles from Smith in previous years and gotta say the new ones are so much quieter. I can sometimes totally forget that the fan is even on. Visibility is awesome and my glasses never fog up. Yea, they're a bit bigger than most goggles, but well worth it. It's not what you look like but how much you enjoy it and the OTG Turbo Fan goggles will allow a clear view of enjoyment.

    Keeping The Fog Off & Visibility On

    not bad but . . .

      I purchased the Knowledge OTG to try out after sending back a Smith IOX Elite Turbofan for repair.

      The Knowledge is a decent OTG fan goggle and will keep the fog off but the fan noise is noticeable, the lens is not near the quality of the IOX (or Phenom or Prophecy as I understand) and lens choice is limited if you want to swap or buy additional lenses.

      If you are looking for a standard OTG goggle that will help keep your glasses fog free - the Knowledge should do the trick. And hopefully you can find it at a deep discount. But for the same price at retail, the IOX without the fan might work just as well, and is hands down a better goggle.

      Best I've ever had.

      • Familiarity: I've put it through the wringer

      Why I've never owned this goggle before is beyond me. For years, I've struggled with fogging glasses beneath my goggles which either forced me into being a much more cautious skier (where's the fun in that?) or just going without my glasses (blind as all hell). The turbo fan technology is great, the low speed keeps things clear and the high speed fixes things up in a snap for those heavy storm days or super warm springy ones.

      I see no need for me to EVER buy a different model of goggle. I use this in conjunction with a Smith Vantage helmet and the duo works perfectly and seamlessly together. Buy this and never worry about foggy glasses again.

      Only downside: only 1 AAA battery goes dead pretty quickly (1 week of use), my suggestion is to just carry a few extras with you and make sure to remove the battery when not in use and during the off season.

      Best I've ever had.

      I have the Sensor Mirror. Overall, very good for variable light conditions, only thing is looking through two sets of lenses (glasses and goggles) just presents issues in low and flat light on its own. Not much you can do about that. As for night time, try to find a clear lens for that.

      Here's a good description of lens types/abilities:

      Hey I got these, Thanks for your review. Have you found any tricks to replacing the lenses? It took me over 30 mins and many tries to replace it the first time and have that bottom black border sit flush with the bottom lining of the goggle. The first 5 tries I saw the border in the lens and it was like double vision. Any tips?

      Try adjusting the lenses in the bathroom with the shower running on extra hot, I've been able to fix glasses this way too, just a little bit of heat and steam can do wonders for finicky frames.

      Turbo is the fog solution

      • Familiarity: I've put it through the wringer

      I've been using the Smith Turbos for years. I don't know how many different types of crap I put on my goggle lenses to prevent or even reduce fogging, but nothing was ever good enough... until I found Smith Turbos.

      The design has improved over the years and the initial issues have been resolved. The battery pack is minimal (holds one AAA battery), stays out of the way, and is sealed. The fan noise is almost imperceptible.

      I've been out of the wettest and snowiest days and as long as I can keep my wipeouts from filling my goggles with snow, they stay fog free.