Leatt 4.0 X-Flow Goggle Review



Words by Drew Rohde  |  Photos by Max Rhulen

These may be the most breathable and ventilated mountain bike goggles on the market, but could it be too much of a good thing? We’ve had the Leatt 4.0 X-Flow goggles reviewed here since Crankworx Whistler and have been using them a ton. They offer great breathability, field of view, comfort and safe, high quality optical performance. But, as much as we love them, there is a pretty big caveat to the goggle’s optimal riding conditions and one we think is very important to consider for those looking for an enduro or eMTB goggle. 


Since we go into pretty deep detail in our video review, we’ll keep this short and to the point here:

  • Fully open upper and lower frame for ultimate air flow
  • Minimalistic foam for a sunglass feeling
  • Bulletproof 170° WideVision RideViz MTB Lens
  • MaxiVent 50mm anti-slip mesh strap to prevent helmet vent blocking
  • Permanent anti-fog function built into the lens
  • Self-draining open lower frame design allows dirt to fall from lens
  • OTG – Over-the-glasses fit
  • Dual-layer, anti-sweat face foam
  • Bulletproof lens tested to:
    • ANSI Z87.1-2015
    • Military Ballistic Impact Standard (MIL-DTL-43511D)
    • Complies with PPE Directive (EU) 2016/425

Check out the video below for the full run down and our take aways from the X-Flow Goggles.

The Wolf’s Last Word

In the video review above you can see just how open the ventilation is and while that does mean airflow is amazing, the downsides are real. In very cold conditions with a full face, breath can come up and fog the goggles, although the fog disappears as quickly as it comes thanks to the airflow. What doesn’t always leave as quickly however is the debris that gets flung up and into the goggle. We’ve had loam, mud, and other trail shralpage enter the goggle and our eyes from both the top and bottom of the goggles. This typically happens on wetter days or when soil is rich and heavy enough to get flung up. If you’re riding hard pack dirt, or trails where the earth’s goodness doesn’t get flung up, then you’ll likely have your new favorite goggles! For those of us looking for a winter goggle, the 4.0 X-Flow’s may not be the ticket. However, Leatt does have the standard Velocity 4.0 Goggle which uses the same lens and straps but has a full frame that has ventilated mesh-lined ports for $64.99.

Price: $69.99
Website: Leatt.com


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