"Teens know that anyone wearing one of the bands will listen and help that person without judging them, without running off and telling others.
"They don't have to fix that person but they can get them help."
New Zealand has the second higest suicide rate among those aged 25 and under in the developed world. Our teen rate is the highest.
Around 133 teens are lost each year to suicide. One of those who died last year was a student at Papamoa College in the Bay of Plenty.
Principal Steve Lindsay invited King to speak at the school as part of a multi-level approach to avoiding another suicide.
The Year 13 boy who took his life in the third term was the son of a staff member - making the death all the more painful for the school community.
"In this case we felt it at a student level and the adult level as well. The family is central to our school, a great family and very much part of our community."
An 8-metre sheet of art paper was rolled out on the library floor and colourful markers scattered so students could write a poem, share a memory or pen a prayer for their friend.
"People knew they could go there and have a cry, have a word and share a memory. We had people there on-hand for support," Lindsay said.
"At the end we opened the library to family and they brought friends and read all of the messages. It is part of their process as well," Lindsay said.
Lindsay said the school was still healing from the boy's death and invited Mike King to speak to add another layer to the support process.
King's talk was one way of getting conversations rolling about mental health - and it has worked.
Deputy principal Belinda Develter said visits to the school counsellors increased dramatically after King's visit in May.
"Students have been opening up to their teachers - students we didn't realise had any problems," Develter said.
The talk also opened up conversations between teachers and parents and prompted the school to send information home about the confronting Netflix suicide drama 13 Reasons Why.
"We followed up Mike's talk with a message to parents about the Netflix series and we gave them tools to start conversations with their children around that," Develter said.
"We had 120 come to listen to Mike at the parent evening so it was good timing - we don't want it to be a one-off event, we want it to be the start."
Develter said parents and school staff were "buzzing" after King's talks and wanted to continue the openness about mental health struggles.
"He had a debrief with all of the deans and key pastoral people and it was decided we want to build on his message.
"We want to send the message to kids that they need to talk when they have these thoughts. Mike tried to break the stigma down and had all of the kids engaged."
The Herald sat in on King's talk at Papamoa College as he opened up about his own mental health struggles, alcoholism and drug dependency.
Teens too young to have seen King perform as a stand-up quickly warmed to him and some talked about their own struggles.
Others recognised for the first time that they were suffering and needed help.
At the conclusion dozens lined up for a I am Hope band to slip on their wrist. All were given King's cellphone number in case they needed to talk.
Four teens from Papamoa College called or texted King after the visit to talk. He returned every one.
Principal Lindsay said King's talk and the I Am Hope bands were just one part of ongoing support for students.
"Some might benefit from speaking with a counsellor but others might seek out a peer wearing one of the wristbands," Lindsay said.
"It might be that they just spot one and remember the message behind it."
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call 111.
If you need to talk to someone, the following free helplines operate 24/7:
DEPRESSION HELPLINE: 0800 111 757 LIFELINE: 0800 543 354 1737 NEED TO TALK? Call or text 1737 SAMARITANS: 0800 726 666 YOUTHLINE: 0800 376 633 or text 234
There are lots of places to get support. For others, click here.