Wat size winter blanket should i get is this winter blanket good enough {pictuer included and info ?

i am getting this for my horse and i live in upstate new york (albany area) is it warm enough i dont shave her fur off a href="http://www.horse.com/New-Horse-Supplies/1200D-INTEGRATED-NECK-THEMOLINED-TURNOUT-BLANKET-BES23.html" rel="nofollow"http://www.horse.com/New-Horse-Supplies/…/a