Not cloth.
Read the description from the link.
Anti Skid Lab Safety Disposable PPSB Shoe Cover - 100 pieces size XL
http://www.ebay.com/itm/Anti-Skid-L...097?pt=LH_DefaultDomain_0&hash=item53f6104599
Item Description:
Spunbonded polypropylene anti-skid shoe covers may be used to protect against dirt, grime, and certain dry particulates in non-hazardous environments. Appropriate for industrial, pharmaceutical, food processing, construction, and certain environmental cleanup applications.
Product Features:
-
Anti-Skid Bottom
-
Lightweight
-
Fluid Resistant
You are right that these are not 100% effective.
On the other hand, I am not suggesting that these are germ-warfare containment devices. Just that they might be better than nothing.
If I have neighbors "wanting to see the pretty chickens," I see no need for any precautions.
If someone who raises chickens visit, I will ask them to don the booties. I don't think I would insist that they change clothes or wear a "moon suit".
If someone who has had trouble with Marek's Disease visits, I will hand them a pair of binoculars and ask that they view from their car in the street.
If I visit somewhere, I'll wear the booties.
Don't like washing shoes.
If I go to a poultry show, I'll soak the shoes in bleach solution.
To be perfectly safe, you would have to never add to your flock. Or have a quarantine site hundreds of feet from your flock. Upon leaving the quarantine site, change clothes and shower at an intermediate site before coming home. Of course, you would have to come into the intermediate site through one door and leave through another door. It can be done, but is impractical.
We do the best we reasonably can. Not great, but better than nothing.
The problem I have with these covers is that I don't think they would last more than a few steps on gravel. There are cheaper ones ($5) that are VERY thin and likely not to last more than a moment on anything rougher than carpet.
Search ebay.com for "disposable shoe covers".
John