Is it safe to reuse plastic bags used for sous vide? And if it's safe, any special measures apart from the obvious need of cleaning them.
PD: I mean plastic bags specially designated for sous vide that work with a manual vacuum pump like that
There is not safety issue as long as you clean well. It shouldn't be a problem after most cooks. If using high heat...or very long cooks, you might check the integrity of the bag. Otherwise, I suppose you could wash and dry. I mainly use zip lock-type bags and discard after each cook, simply because they are a p-i-t-a to clean.