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I just purchased a used dry suit but don't have any of the "factory" under garments. I've been told that you can use underarmor, thermal underwear, sweat shirts/pants etc.. which work just fine. I know that how much layered clothing like this that I use is ultimately going to be whatever makes me comfortable but I'd like to try and save some time experimenting with this and see if anyone out there can offer some advice as to what they use at xyz temperature. The suit is a DUI cf200x.
Thanks
I've tried a few different undergarments ... Diving Concepts Thinsulate, Fourth Element Extreme, a couple different brands of polartec, and Weezle Extreme. Of them all, the Weezle Extreme has worked best for me in the environment I typically dive in ... low-40's to mid-50's Fahrenheit. I dive trilaminate suits.
The tradeoff is usually that as you add layers or thicker undergarments for warmth, you have to add more weight to offset the inherent buoyancy of the undergarment. The Weezle seems to offer the best thermal protection for the amount of lead needed to sink it. I have a Santi 400G thinsulate garment that will provide slightly greater warmth ... but at the cost of 6 lbs more lead than my Weezle.
The other thing I really like about the Weezle is that it keeps me warm even when wet. Now, granted, you have to choose a good base layer to wear underneath it. I go with the UnderArmour Cold Gear ... which is a lycra-like material that wicks moisture away from the skin. But I recently had an hour-plus dive in 46 degree water where my drysuit leaked and I was wet from chest to knees ... and didn't feel particularly cold during the dive.
Yet another thing I like about the Weezle is that it's easy to launder. Just toss it in the washing machine and hang it up to dry. Doesn't get much easier than that.
Weezles aren't cheap ... but they're no more expensive than Fourth Element or any of the several Thinsulate undergarments on the market. Any of them will serve you well, frankly ... the Weezle just gives me more overall satisfaction than the others I've tried.
... Bob (Grateful Diver)