I prefer my super old polos from the 1980s. But for new stuff, I will accept Keeneland polo wraps. They take, oh, 2-3 years and 1,000 washings before I actually LIKE them, but after that I think they are pretty darn good. Before the 2-3 year, 1,000 washings mark, they resemble water wings on a horse.
My favourites are the cheap ones I buy at the feed store, True North I think. Probably only available locally, but I swear they beat every expensive pair I've ever had. Almost all my polos have now been replaced with these.
I also have a friend that makes her own, custom polos for the win! Haha
My favorites for the right amount of stretch and thickness, that stand up well to years of abuse, are Classic Equine and Lettia. I've only had my Lettias about 3 years, but they've worn wonderfully, and my Classic Equines still look great after 5 years.
I can't stand the super-thick, super-fluffy polo wraps like Keeneland/Equine Textiles (I believe they're the same brand).
Former Long Islander now in the middle of the Great Lakes
Horze Brand, "Embrace Fleece Bandages" , They aren't too thick or thin, and they hold up to washing machines and dryers. They fit in your hands well and have just enough give. Oh and they are under $20.00 a set.
I like my Lettia wraps the best out of everything I've used so far. They have the right amount of stretch and fabric, don't look bulky on the legs, and have held up nicely. I have some Smartpak polos and they're ok, but there's a bit of extra fabric, (that is close to where the velcro is sewn on), that never lays flat and it drives me insane! They also look a bit bulky compared to the Lettia wraps.