Neat - w/ ice on the side
Joined: Oct 2005
Posts: 1,200
Likes: 0
From: Big Ring. Little Cog.
Bikes: 2005 Dahon Speed TR, 2006 Dahon Mu SL, 2000 GT XiZang, 1999ish Rock Lobster, 2007 Dean Animas CTI
Some helmets have little rubber bands on the straps that you are supposed to push tight up against the buckle to keep the straps in place. if you don't push that rubber band into the buckle after adjusting it, the straps will gradually loosen.
Also the upper adjusting piece that brings the two straps together might be loose, so check that too.