Unfortunatley I don't think this is a good combo 
Nothing at all against either item, I just don't think they go together particularly well
The reason being, the 509 goggles leave a little too much 'free space' on your face when used with the F4 .... below your eyes, and right on your forehead.
I was wearing a thin Klim hood with this combo today in relativley warm temperatures (35 degrees or so), and I used to use this same hood with my HJC/Scott combo, with the hood pulled down around my chin so I could breathe.... I could not do this with the 509/F4 combo because it left bare skin open to the wind ... the 509 goggles have a little bit smaller footprint than some other googles I am guessing, and I was catching wind right below my eyes and most specifically my forehead.
I pulled the hood up around my mouth, and the wind below the eyes was cured, but I froze my forehead off
This could potentially be solved by wearing a thicker hood underneath, I will have to wait till next weekend to try that for sure...
Again, please don't read this as a knock against the F4 of the 509 goggles (goggles really do seem very good IMO just not the best fit for the F4), I just don't think this combination work particularly well together..
And no, the snow building up in my Klim vents didn't cause my head to get soaked today, so I guess i'm not really worried about that ... but yes, snow does kinda build up on them.
Nothing at all against either item, I just don't think they go together particularly well
The reason being, the 509 goggles leave a little too much 'free space' on your face when used with the F4 .... below your eyes, and right on your forehead.
I was wearing a thin Klim hood with this combo today in relativley warm temperatures (35 degrees or so), and I used to use this same hood with my HJC/Scott combo, with the hood pulled down around my chin so I could breathe.... I could not do this with the 509/F4 combo because it left bare skin open to the wind ... the 509 goggles have a little bit smaller footprint than some other googles I am guessing, and I was catching wind right below my eyes and most specifically my forehead.
I pulled the hood up around my mouth, and the wind below the eyes was cured, but I froze my forehead off
This could potentially be solved by wearing a thicker hood underneath, I will have to wait till next weekend to try that for sure...
Again, please don't read this as a knock against the F4 of the 509 goggles (goggles really do seem very good IMO just not the best fit for the F4), I just don't think this combination work particularly well together..
And no, the snow building up in my Klim vents didn't cause my head to get soaked today, so I guess i'm not really worried about that ... but yes, snow does kinda build up on them.