Christmas jumpers have been described as the 'worst example of fast fashion' by an environmental charity.
According to Hubbub, one in three adults aged under 35 buy a new Christmas jumper every year, and two out of five Christmas jumpers are only worn once.
Now the organization is calling on people to customize jumpers they already own, or buy vintage and secondhand options, instead of splashing out on new ones.
In addition, Hubbub says most of the garments are made with plastic.
The charity analyzed 108 of the jumpers available from UK retailers, including Topshop and Primark, and found that 95 percent were made partly or entirely from plastic materials.
Only 29 percent of consumers are aware that most Christmas jumpers contain plastic.
'Fast fashion is a major threat'
"We don't want to stop people dressing up and having a great time at Christmas, but there are so many ways to do this without buying new," said Sarah Divall, project coordinator at Hubbub.
"Fast fashion is a major threat to the natural world and Christmas jumpers are problematic as so many contain plastic. We'd urge people to swap, buy secondhand or re-wear, and remember a jumper is for life not just for Christmas."