Down is, hands down, the best warmth to weight ratio you can get on the market. It is super warm, super light, and packs down super small, but also comes with a super high price tag. Down simply isn’t feasible for everyone and, honestly, it doesn’t always make sense for every situation. If you will be eloping in a location that is known for its damp, wet, and/or rainy environment, a down jacket might not be your best option. Down requires its “loft” capability (fluffiness of the feathers, essentially) in order to capture and retain heat to keep your body warm — as soon as it gets wet, however, those feathery fibers stick together and aren’t able to do so anymore, making it much more difficult to stay warm, especially now that you are wet.