I have consider the buying the HCX-HD1 1080p Full HD Helmet Camera . The description from the manufactor website list it as weatherproof, mudproof, HD, rotating lens, bult in mic, LCD screen and LiIon battery for 2.5 hrs. It does not listed as Loop recording, however listing from other seller has it list as 15, 35, 45 loop recording. You probably can contact the manufactor to be sure if it does have loop recording.

http://www.consumersupermall.com/hcx...a-p-29002.html

http://www.cycleprotectionproducts.c...ra-p-1161.html