I just bought the one made by Arctic Shield last week. Blains has them on sale for 199.99. The last 2 days of high winds and cold temps in ne iowa the suit made for comfortable 4 hr sits!Heater body suit, Arctic shield or Iwom. All three get a lot of good reviews. I have Iwom because I prefer the arms versus having to "get out" of the HBS. You can't get a warmer garment than these.
Cabela's had a pair of stand Hunter extremes that were good and heavy. I am not seeing that they carry them anymore though.
This is what I have, warm and keeps me dryCabelas MT050 have been great for me in the stand. I bet BassPro got rid of them & probably sell Redhead stuff now.