I will add my 2 cents here
I own both the MTO50 parka/jacket and 1 piece coveralls, and bibs, and pants
I also own the Cabela's Men's Wooltimate™ Jacket, bibs and a few other items
I also own, a bunch of gear by Raven wear, and some by sleeping Indian
I have spent thousands on cold weather hunting gear over the yrs

IMO
if you want really WARM cold weather gear, its NOT going to be water proof
all the liners in things,that make them waterproof , freeze at very low temps and get brittle and get very noisy, and thus end up failing
BUT if its really THAT cold out,. it shouldn;t be raining, so its NOT needed any ways, which is why again, I say GOOD cold weather gear does NOT need to be, and isn't water proof!

if you feel a need for waterproof outer layer, BUY good rain gear and wear over your cold weather gear!
it will do two things for you, one keep you dryer, and two keep you warmer, as it will lock heat inside the insulated gear under it!

as for the MT050
its OK stuff, there is much warmer things however
including the again Cabela'sWooltimate series stuff if, you want to buy from a big chain store!
HOW Much longer it will be about since the merge with bass pro?? who know's
but both the MT050 and the Wooltimate are decent gear , or mine has been

ALL my MT050 gear was fairly good and water proof the first yr in LIGHT rains, but ALL of it failed in longer term rains, rain bleeds thru things after enough hours to exposure
and why I always say, GOOD rain gear is that RAIN gear, and insulated gear is that.
from ALL my money wasted trying, to find some that does both GREAT, none have to date! or not long term, maybe when brand new then after some wear and tear, well, leaks happen a LOT more!
you can sort of think waterproof boots here, they work good new, or till some wear and tear or LONG term standing in water and well, water bleeds thru, faster as time goes by, same with clothing targeted as water proof!
Neoprene might last the longest in one that can do both , but it doesn't breath and you will sweat like mad if active wearing it!
so,
you have to think what your in most and use gear for that and carry other gear if needed for other things like rain!

OF all my Fav heavy weight gear, has been by far, the Raven wear stuff, not targeted as waterproof, but lasted as long as anything else (goretex like) and was warmer, softer,and quieter
all qualities I like!


then again, it costs a LOT more too , so it should, and it lasts longer than any gore tex item ever will! have more than enough of it to prove this !
Buts sadly the owners retired and no one took over for them!

still some items now and then floating about on Ebay and such, but??
the days of custom fitting and made to order are over, a shame, as that was a great option, to have when buying GOOD gear, they made it to your size and requirements! and the stuff was awesome?

Sleeping Indian still makes good gear too if one is interested! IMO