My old socks were starting to wear out (mostly tearing around the ring), so I bought 25 socks (minimum order) from filterbag.com.  These are 7x16 200 micron polyester socks with a polypropylene ring.  They are singed on the outside and soft on the inside.  They are quite a bit more flexible than my old ones, which were polypropylene with a singed interior and exterior.  They cost me $97 shipped, which works out to $3.88 each.
Here they are:




				
			Here they are:




 
	 
	 
 
		 
 
		
 
		 
 
		
 
 
		 
 
		