I2 series is entry level suit, it isn't insulated. I dont think its a bad suit, you will have to dress up under suit. I do believe that they zip up to hips, never heard of it being a problem. I'd be more prone to wear the FXE suit if it is a snosuit, it was and still is arguable the best suit ever made, IMO. If they get to warm unzip the 3 way leg zippers to vent.