[cummings66]

I might be brief, but I assume in 37 degree water that any sane person is in a drysuit. It'd be foolish to be in a wetsuit in those temps. I have found through trial and error that how warm you feel in the drysuit during the SI really depends on the squeeze more than anything else. If you got chilled it really does help to get out of the suit and wear more layers. The drysuit is dry and you won't get cold putting it back on so there's nothing to lose by taking it off. If it's raining, sleeting or snowing I leave it on. If it's just cold I take it off and put a jacket on over my under garment.

I have dove this way down to about 0 degrees F, 36 degree water and have never found it to be a problem. When it's 0 or below freezing I will try to minimize the SI and get back under water ASAP. If I must have a long one and it's cold out it depends really on whether I can get back in the car or have to stay outside.

Before my tank comes off by the way, the suit gets inflated. It does help to make it real roomy inside, you've got to allow the under garment to air in order to warm up. I still feel adding another layer on top works better than just airing the suit.

In the end you do what you can to stay warm, I try to avoid fires and heaters for fear of melting a hole in my drysuit.

In the finest tradition of the Internet I've posted a long clarification in order to say what I do varies depending on temps and conditions. There is no magic mojo that helps. PS, it was 33 degrees outside when my avatar was taken. My daughter hopped out to get the pic and then back in. I stayed in the water floating during most of the SI's because it was warmer than the air temp.