I have a warmbag and love it. I got it specifically so I didn't have to bundle up like the Michelin man to hunt. I have worn just basic 6 pocket pants and a LS t-shirt with a chamois shirt on top all season and been plenty warm. It is windproof and waterproof. So for the $200 I spent on my warmbag I have saved tons of money over buying many layers and a rainsuit too. Don't knock it till you've tried it!