I tried I4'a and couldn't live with them, not enough space and they forced my ears onto my glasses giving me a headache. Currently use Vforce vantage and Profilers(two sets), or JT Proflex (2 Sets) one of each goggle type has a fan kit installed
I also use a good defog on my glasses either catcrap http://www.amazon.co.uk/Ek-123625-Cat-Crap-Anti-Fog/dp/B002ZNA488
or this stuff by muc-off works really well http://www.amazon.co.uk/Muc-Off-PN-214-Anti-Fog-Treatment/sim/B00167S7HO/2
I also use a good defog on my glasses either catcrap http://www.amazon.co.uk/Ek-123625-Cat-Crap-Anti-Fog/dp/B002ZNA488
or this stuff by muc-off works really well http://www.amazon.co.uk/Muc-Off-PN-214-Anti-Fog-Treatment/sim/B00167S7HO/2
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