I dont use one. I used one for a couple years and never could figure out why my accuracy wasn't quite the same as without one. Started fooling around earlier this year and I figured it out. With a loop my release hand was too far back on my face and I couldn't anchor it in to the bottom of my jaw like I always had before. I ditched the loop and now I'm shooting great again with a consistant anchor. I also shoot a longer ATA bow so I dont have no problems with my arrow falling off when backing down or serving wear.