“Make better. Buy better. Wear it longer.” Lots of fashion brands are including claims like this in their adverts and one item of clothing that’s really getting the stamp of supposed “sustainability” is jeans.

Maddie has asked Greg to look into what “sustainability” actually means when it comes to denim. Is it a term that marks genuine eco-impact, or is it more marketing BS? And, as adverts claim, do “sustainable” jeans last longer?

Greg speaks to an organisation that rates clothing brands’ sustainability credentials and visits Manchester Metropolitan University to hear the results of their ‘rub test’. Do you have a suggestion of a ‘wonder-product’ making a bold claim that Greg can investigate next?

Send us your suggestions to sliced.bread@bbc.co.uk or send it to Greg direct on Twitter and Instagram where he’s @gregfoot

PRESENTER: GREG FOOT PRODUCER: JULIAN PASZKIEWICZ