realskiers

Max great link....splains a bunch!  Thanks.

JB...I'm just saying for me...if I"m out making tons of turns 4-5 hours on the snow....groomers, pow, bumps, crud or whatever....I"m working up a good sweat..with good silk base layer and wick away layer above that..it moves that moisture away from my skin but I find it's got to have somewhere to go....underarmvents certainly help a great deal...but..

I find that gear that breaths is critical...especial ly at 15 deg f and colder when opening up the jackets just creates a body chill. I have always used front and underarm vents to help mitigate overheating...will be curious to see if the higher breathablity feature really pays off.

Jim...interesting 6 cents cause its the first time I've had those kind of vents on any jacket I've owned...(vents in front) are on my new Spyder....glad to hear they work well.
G