Smart mouthguard tech is expected to be rolled out this Super Rugby season- but there's safety concerns.
Players are required to wear them to be eligible for the H1A1 protocol, meaning players will be taken off the field if there's a suspected concussion.
However, Australian rugby players have voiced unease regarding the technology, and some have claimed they've had trouble breathing.
Former NZ Rugby CEO David Moffett says it's concerning the players didn't get the chance to try them out in the off-season to identify potential issues.
"I still would like to see World Rugby doing a lot more in the area of collisions."
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