Check your helmet regularly! We have had reports of substantial rust (and occasionally strap failure) on the following brands: Airoh Leatt Bell Kali Just1 Fox Acerbis Oneal Suomy Jitsie. I recently went to put on my three year old Suomy helmet and the strap came off in my hand due to a completely corroded bracket. I did email Suomy about this and seven months later I still had not heard from their head office but a concerned Suomy dealer did report that that the issue was confined to 2013 and 2014 models that used an alloy bracket and a very small number of these corroded and broke. They have used 303 stainless since 2015 according to his report (see further post below)..... A quick search found other riders with the same rust problem (within one to three years), and also quite a few with older Airoh helmets doing the same thing due to rusted brackets (within three months to three years). Suomy did change to proper stainless steel brackets at some point in recent years and I can't find any failures since then. Airoh refused to respond to our questions so we can't confirm if they ever changed to stainless steel. Whatever I buy next I'll be checking those brackets for rust at least annually! Ideally any decent manufacturer will use marine grade stainless steel to avoid this issue... even my retired $40 Aldi helmet had this and was fine after years of sub tropics dirt riding. EDIT We are particularly concerned that Airoh never responded to our questions. A hard enduro rider they sponsored, David Knight, even scrapped his Airoh sponsorship deal when the straps broke off two Airoh helmets, one at three months and the other at six months.