From what I can work out the advantage of indoor/outdoor fabric is it's wipe clean and very tough, and resistant to mould/mildew. But that is in relation to outdoor furniture. For campervans, I'm not sure how necessary it is but DH read somewhere that outdoor fabric is best.
Thank you for the suggestion. Ticking fabric would give just the look I'm after. Where can I buy it cheap Petula?
I'm hopeful that it won't get damp, we have made sure to insulate and ventilate it well. DH read something about outdoor fabric but can't remember where now. I think I'll just look for upholstery fabric in a practical colour.
Is it a VW camper? The seats tend to be upholstered in leather.
I recovered the seats on ancient caravan once and used inexpensive draylon type fabric. That was before the whole vintage thing took off, so I probably wouldn't use that again. It was very practical though.
I'm planning on doing mine this winter as they're a bit tatty and want to make removable ones that I can wash. I've got a VW but don't have leather seats. I quite like some of these and they're discounted at the moment.
We got the fabric for ours at a local upholster's suppliers that was recommended by the company that lined our van. Its a dralon type I think, don't think its got any particular properties. We also did some other bits with curtaining? material from Ikea.
Whereabouts are you? Anywhere in the North West, check out Abakhan fabrics, or down south, "The mill shop online". Both sell online, but if you go in person you'll see a better selection and can ask advice from their very knowledgeable staff.
I would avoid outdoor fabrics: they'll feel sweaty, even through your bed sheets. A good, solid cotton ticking sounds ideal, and should be nice to work with. Consider doing removable covers where possible, and don't forget to wash the fabric and any linings before you cut them, if you want to be able to wash the finished item!
I would also think about flame retardancy if you're likely to use a gas cooker in your van. I'd probably make fixed under-covers of flame-retardant felt. That provides a barrier between your washable top-covers and the foam, and you can wash the top covers without losing the fire retardant.