Polypropylene is probably the best fabric for wicking away sweat and keeping a dry feeling but it is heat sensitive and must be kept out of a clothes dryer. The various technical polyesters (Coolmax, Thermax, etc., etc.) are probably the next best fabrics for both remaining dry and are easier to wash and dry. The polyester fleeces are the best combination of warmth with minimal weight but need a windshell over them.
This message was edited by DaveB on 10-12-04 @ 6:23 PM