Sleepsack practice.

You want a story? Oh. Uh… In an alternate universe, Tempest isn't let off scot-free after the Storm King's invasion. However, because of her repentance, and that she risked her life to save Twilight, she's given five years in the dungeons instead of fifty that would-be conquers are usually given. And instead of being tightly bound head-to-toe, she's put inside a loose-fitting sleepsack, placed in a cell, and locked up.

Now alone in her new home, Tempest eyes her new garment. She can move her legs a little, and it's comfortably warm (and allows her to breathe without airholes). Considering what could have happened to her, she's grateful at being shown mercy, and settles down to begin her sentence.