In 2019, a Knoxville, Tennessee, law firm announced an investigation into a potential class-action lawsuit against companies that sell bike helmets lacking new anti-concussion technology like WaveCel and MIPS. Greg Coleman Law is advertising on TopClassActions.com, trying to find people who have suffered head injuries while using helmets lacking the new technologies. The potential lawsuit was first reported by the Bicycle Helmet Safety Insitute, and a spokesman there told BRAIN on Thursday there has been no update.