Good blankets to use at winter shows??

My mare is trace clipped and hates the cold. I do hunter/jumpers, and the place I show at in the winter is insanely cold, regardless of what it's like everywhere else. Do you know of any good blankets that I can keep on her while we wait around? I want something warmer than like a fleece sheet/cooler, but I don't want it to be really bulky or waterproof; just enough to keep her warmer. Preferebly under $70. Thanks :)

Newmarket for Horse by HorsewareŽ

Warmest blankets ever. They sell them pretty much everywhere. Like dover and smartpak and such.