ScoobieDooo
Guest
You don't need specialized undies. Any fleece or polypro or Thermax from climbing, mountaineering, skiing that insulates as well as wicks is fine.
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During my commercial diving career, I've done stretches where I'd be be in the water for 10-11 hrs/night, 7 days/week, for weeks/months on end.If you're going to be stuck in a cave for 9 hours...
netmage once bubbled...
For the most part you should be ok for cool waters - the key is to avoid cotton and go with Polartec type fabrics which retain heat when wet/damp.... When the water gets downright cold - Polar Fleece isn't cutting it - for me at least...
In 60-70 degree water I use a set of Cabela Polartec longjohns...
In 45-60 degree water I use a set of 300 weight PolarTec jumpsuit (TJ's Softwear)
Below that and the jumpsuit isn't cutting it to the point of warmth - but I'm not freezing either.... So now I'm exploring a custom jumpsuit using 400 weigt thinsulate.