<p>Fleece is warmer than flannel for sheets. H sleeps in a sweatsuit in winter for pajamas. Add wool socks an a hat if you wish. Down alternative is better than down since it can easily be thrown in a washer and dryer, plus doesn’t tend to bunch up like down. Do remember you may need to keep the room at a tolerable temp for your roommate.</p>
<p>Wear something with a turtleneck to keep the cold air from going down your back, and maybe wear something on your head to keep from escaping that way (in addition to wearing socks).</p>