I love my Amerigo Special Dressage girth (in havana) for my old Amerigo monoflap. I don’t have a monoflap anymore, but having that girth makes me want to turn my jump saddle into a monoflap! :o
I used to use the Prestige Contour Elastic Dressage Girth in tobacco for both my XC saddle and my dressage saddle: http://www.vtosaddlery.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=PCEDG&gclid=Cj0KEQiAzai0BRCs2Yydo8yptuIBEiQAN3_lFrF8OvEpAUms1bW51NVSPMTaF3GbBX64IH_bUmPKuDkaAkYq8P8HAQ
I only used it for a couple of years and it held up well. It’s actually in wonderful shape, tbh. It isn’t havana brown as I would have liked and I tried oiling it, but it never really did oil up and darken the way I would have liked. Unfortunately, it caused girth rubs on my new horse, so I ended up getting the Toklat woolback dressage girth in brown for shows and use a cheap Ovation black fleece girth for schooling.