the most i have done is thermal underwear and a shell pants i have been fine in 20F weather with that. there are not that many insulated pants so i would just go with some normal shell like pants and then wear long underwear underneath and you will be just fine.
My legs are the last thing to get cold usually. as for your feet, just normal snowboarding socks and you should be good. snowboard boots are very warm.
if you do get cold with long underwear, then throw on some sweat pants under those snowpants as well, but i highly doubt you will need this.
i'm not sure what you mean by "shell pants" but just get some normal snowboard pants and you will be fine. some companies for pants are airblaster, burton foursquare, 32, holden, ride, 686, volcom, thats just a few of them
Last edited by twin89; 10-10-2011 at 04:12 AM.