The 32-year-old tragically lost his battle with bowel cancer, so the pair is encouraging men to grow a beard to raise awareness and much-needed funds to beat the disease.

That's what the annual Decembeard campaign's all about.

Even women and children have a role to play, too.

They can make or fake a beard, host a Decembeard-themed fundraiser and encourage their fathers, brothers, husbands, boyfriends, partners and male friends to find out about bowel cancer.

For the Days, it is an extremely personal crusade.

"Mitch was diagnosed with bowel cancer in late 2017, which came as a huge shock and surprise being so unaware of the signs and symptoms of the disease," Josh admitted.

"During his battle, we learnt so much about it and how many people are affected by it in Australia.

"Mitch was only 32.

"So, for something which is always seen as an 'old person's cancer', it was initially hard for us to take.

"But, we soon realised that it affects lots of young Australians, too."

Luke added during his brother's short battle, Mitch remained positive.

"However, he wanted to ensure that no one would have to experience what he went through," he said.

"Mitch passed away about three months later surrounded by all his family and friends.

"And, since then we have set out to fight bowel cancer through social media awareness, posters and also through sport.

"We also created a rugby league team called the Memorial Bears.

"We've raised money and awareness but also play in honour of those who have fought or lost their lives to this terrible disease."

For further details about Decembeard and to sign up, go to decembeard.org.au

1 in 11 Australian men will develop bowel cancer in their lifetime

More than 8500 Australian men are diagnosed with bowel cancer each year

About 697 (8 per cent) men diagnosed with bowel cancer are under the age of 50

Bowel cancer kills more than 2900 men each year, 158 (5 per cent) are under the age of 50

Bowel cancer is the third deadliest cancer in men

Bowel cancer affects men of all ages

Participate in bowel screening appropriate to individual level of risk

Avoid processed meats and limit red meat consumption

Be physically active as part of everyday life

Quit smoking

If you choose to drink alcohol, limit the amount

Avoid weight gain and increases in waist circumference

Eat wholegrains and naturally high-fibre foods