"They are doing it because they want the living wage and at the moment they feel the wage they are being paid is not a full day's pay and so they are not going to do a full day's work."
The workers are struggling to make ends meet, Thompson said.
H&M worker, JessiMae Peato said she is striking because she wants to rent a home for her and her two children, instead of living with her family.
"I want to work in fashion, but I'd earn more at the Kmart across the street or the Bunnings down the road. I don't want to have to choose between a career and a means of survival."
H&M has been contacted for comment.
- RNZ