Once registered at movember.com each Mo Bro must begin the 1st of Movember with a clean shaven face.
For the entire month each Mo Bro must grow and groom a moustache. There is to be no joining of the mo to the sideburns (that's considered a beard), there's to be no joining of the handlebars to the chin (that's considered a goatee) and each Mo Bro must conduct himself like a true gentleman.
A Mo Sista is essentially a woman who loves a Mo. An individual that is dedicated to supporting the Mo Bros in her life through their moustache growing journey; whether it be a friend, colleague, family member or partner.
These inspirational women are committed to raising awareness of men's health issues and much needed funds for men's health along the way.
Mo Bros effectively become walking, talking billboards for the 30 days of November and through their actions and words raise awareness by prompting private and public conversation around the often ignored issue of men's health.
Gloucester Rugby's effort is being spearheaded by hooker Huia Edmonds who will be encouraging and cajoling his team mates into taking part.
Huia told the club website this why he's keen for his team mates and himself to be involved:
"It's a great cause and fantastic that the game of rugby union comes together to support it.
"I'm sure there will be varying degrees of success around our squad - some of the younger boys haven't started shaving regularly yet so it'll be fun to see their efforts!
"But everyone taking part is doing it for the right reasons, so I hope people will visit our online page at http://mobro.co/gloucesterrugby and get behind us."