Have you tried baking soda ? Baking soda is especially helpful for removing smells from many types of leather surfaces, including suede.

I would try sprinkling them with bicarbonate of soda, letting it sit for a while and vacuuming off. Patch test on an inconspicuous spot first

Thanks for the answer – do you know the name of the leather cleaner?

you can buy a leather cleaner that has lavender in it – it is awesome. some of the nil odour and orange based products are good, but follow directions

The smell of cigarette smoke is hard to remove. I was given a very expensive used bag in excellent condition apart from the smell of cigarette smoke. It just lingers and will not go – seems to have permeated into the leather. I would love to know how to remove or mask the smell. Would love to get an answer to this question too.