Potato storage

I don't seem to be able to buy any large paper bags or hessian sacks to store spuds.
 Admittedly I'm being presumptuous as I don't know if I have any potatoes as I haven't dug anything up yet. I can get white cotton sacks used in gyms, laundries etc, would these be OK to use?
  Or should I just leave em in the ground and dig up when required, that's what my mate does, but perhaps the slugs will get them before I do. 

Thanks.

Edit. I can also get a few onion sacks but I thought they would be best, well, for my onions.

 

Not sure whether the white sacks would keep them dark enough muddylou. Have a look on e-bay, there's 56 results for potato sacks, and be positive of course you'll need them failing that, I wonder if you could use cardboard boxes like you can with carrots? I'm sure some-one cleverer than me will be along shortly  

You could try your local chippy - not the woodworking kind  

Failing that do you know anyone that keeps chickens/pigeons as their feed often comes in paper sacks.