Remember that down-filled parka you were going to put on your house? Well, in considering where you need insulation, let’s think about the parka again.

If you’re outside on a cold day with a parka that’s a couple of sizes too large for you, you’re going to feel colder than if you’re wearing one that fits you properly. That’s because a large, loose parka will let cold air in and your body’s heat out. (more…)