i am trying idea with CAMO COVERALLS.i take a 2xl as i am 6/1 210.for my idea to work i will have to go to a 4xl/5xl,dont know yet.
heater body suit makes you open front.i dont like that.lets heat out.
my idea is too just stick your arms out thru the coveralls sleeves.if your coveralls are big enough, you should be able to slide your arms out in sleeves.

this is only idea until i test it.if that does not work, i am cutting the sleeves off and putting magnets of some sort on the openings.this way i can just slide out and slide in.magnets should close the openings.

again dont know if it will work.another thing i have a 18 inch neck, by going to bigger size to make this into heater suit,i dont know what my neck closure will be. you dont want a big open area around your neck.
i think you almost have to go to 3 sizes above what you are for this to work.i could be wrong and maybe 2 would be fine but i bet 3 could be ticket, dont know until i can find a place that has sizes up to 5xl so i can try on different sizes.
with my idea you would not need to open front on your coveralls .this i believe would work for crossbow/gun/muzzleloader.compound bow,you would take your arms and pull zipper down. but i dont know how much noise the zipper would make.i would think very little if you put wax on it,wax will deaden noise of zipper.

for your feet i would use BOOT BLANKETS that are on sale for 29 dollars.this idea would be better in treestands and on ground, i feel.you could dress light coming into your spot, sit down and just put coveralls on.
i saw insulated camo coveralls at wal-mart for 30 dollars on sale but they are gone now.problem is biggest size i saw was 3xl.i think if you are medium/large size the 3xl would be about right.i think i need a 4xl or 5xl for this idea to work.

heater suit has a lot more things it covers like WINDPROOF/WATERPROOF.i saw coveralls that are waterproof for around 129 dollars.heater suit is 350 dollars.
if i can find place to try on coveralls so i can pick size, i could make my test this winter hunting coyotes ,right now its hard to find any hunting gear locally.i may trey to see if jc penny has big size coveralls for work.that may get me started on sizes.

take care sproul