you really should check out the Rem-Lites or Trek-Lites...they are AWESOME...i wear them all year long...if it gets too chilly i just throw some longjohns on underneath...the pants can be worn as shorts too.

click on the link to see what i'm talkin' about:

http://www.basspro.com/servlet/catal...rTarget=browse

the stalker lites are also good...i have one set of those that i wear as well....they are super quiet yet cool!!