I'm still on the hunt for the perfect sheepskin boot 
I ordered myself some Emu boots but when they arrived they were too wide (although snug in length) and my heels slipped up and down immediately which was not comfy..so they went back. I tried Fitflops Mukluks..liked but they don't have sheepskin insoles.. Uggs.. I'm a little reluctant because I don't just want to pay for a name..tried on the 6.5s and they were a bit tight tho I know they will stretch.
A friend recommended Celtic-Sheepskin ones..I tried hers on and they were mega comfy, plus genuinely british..still expensive tho not quite as mad as UGGS. She hasn't had hers long enough to know if they will last tho, so just wondered if anyone has got any, before I take the plunge. Ta!