This is not that good a picture, but it is a seat, that attaches to a tree and folds back, so you can get a bow shot standing up in a

Y-tree.  It is over 10 years old and I do NOT leave it in the Y-tree.   It is similar to this one at Cabelas:

http://www.cabelas.com/cabelas/en/templates/links/link.jsp?id=0004819415043a&type=product&cmCat=search&returnString=hasJS=true&_D%3AhasJS=+&QueryText=tree+seat&_DARGS=%2Fcabelas%2Fen%2Fcommon%2Fsearch%2Fsearch-box.jsp.22&Go.x=20&Go.y=3&N=4887&Ntk=Products&Ntx=mode+matchall&Nty=1&Ntt=tree+seat&noImage=0&returnPage=search-results1.jsp

but it folds back.  I like the swivel seat for muzzleloader and rifle hunting and the fold back for archery.