picked up a new f4 at hay days been wanting one for a few yrs just did not want to drop the 400.got a 2010 at hay days for 225 not bad my bud got the 2009 for 179 .I like the 509 aviators any one run them with the F4/if not what are you using and how do you like them?I think this helmet should keep the skull cool even on a hot day boondocking with rookies may not have to take it off to tug ski,s
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