Ho-ly snap. I really enjoyed this piece; it's so calming and elegant, and it feels like a folk song mixed with something out of Bambi. Everything used in here accounted for this really wonderful imagery of a winter sky, and the fact that it's so simple and yet so powerful makes it all the more amazing. I felt so cozy listening to this, and each listen enhanced that further. The vocals are wonderful, especially considering it's not just one voice, but quite a few, giving it this ethereal (no pun intended) feeling, which is something that's hard to get in music nowadays. And that chord at the end... it solidifies the deal of this entire piece.
There's one small nitpick I have, and it's personal preference more than a general thing: at the section from 2:35 to 3:08, I feel that some soft vocals could be added there, as it felt to me that it was kinda naked on that part without voices. Plus, small voices in that part could help lead into 3:08 when the main vox comes back in.
Honestly, though, this is a really amazing piece. This is for sure going in the favorites pile. Amazing job LSD and ethe!