I generally agree that most of the stuff from China that you find on AliExpress and FleaBay is poor quality. But another exception is LS2. They've exploded on the marketplace in the last half-decade and you can find their helmets stocked in almost every motorcycle shop these days. That wouldn't happen if a shop had to deal with excessive warranty returns.
My wife has one of their dirt bike helmets and my buddy has their touring modular helmet, both are very good quality and hasn't crumbled to pieces over the years.
My wife has one of their dirt bike helmets and my buddy has their touring modular helmet, both are very good quality and hasn't crumbled to pieces over the years.