Spotted on walk

Not seen one of these before.  Could be because it is on the edge of an industrial site as it is for franked mail and parcels.
I have volunteered to make 'scrub bags' for local hospitals.  They are used to put soiled scrubs in and then the whole thing is put into the washing machine at 60 degrees.
You can use old pillowcases etc but I managed to find a lot of curtain lining in my stash of material.  Making a prototype tonight before I do some serious cutting out.  They also need headbands to wear under the protective head gear but they look more fiddly even if they take less material.  
After all I have got rather a lot of time to kill.  At least it is not mail bags!