[Godebert]

There's no "bio" on Mars to degrade textiles or anything else for that matter. I reckon Mars would be a good place to set-up a mummy cemetary.

[NonValueAdded]

Exactly my point. In fact, if we did use biodegradable materials, the bio that would consume them would be our own hitchhiking germs. Sure, the Martian environment would be pretty hostile to them, but why send a food supply to even slightly increase the odds that a colony of earth bio could survive and adapt? Then there is that tiny, tiny chance that we could be feeding the natives :)