I was researching alternatives to vests recently and saw a mention on an old thread about this shirt.  I'd kind of ignored them in the past and decided I wanted to try one.   They don't make them anymore, but there are some out there if you Google them.  I ordered a brand new one in Obsession for $60 to my door and the next day found one used on Ebay in a less green camo for $25 total.  I got the new one in today and I must say I am impressed at the features.  I put a couple of pots and strikers in the designated chest pockets and you hardly realize they are there.  
I can't wait to try these in the woods next spring.
This should really aid in shedding a vest.  
The Ol Tom flyweight mesh back shirts you may find on line are not the vestless shirt.  They don't have the same features.