Questions & Answers about Der Pullover ist so weich, dass mir sofort warm wird.
German often uses an impersonal construction to talk about feeling warm or cold:
- Mir ist warm / Mir wird warm.
- Literally: To me it is warm / To me it becomes warm.
Here, mir is in the dative case and marks the experiencer (the person who feels the warmth). There is no personal subject like ich doing an action.
You can say Ich werde warm, but it sounds more physical and a bit unusual, as if your body were literally heating up. For everyday “I feel (getting) warm”, mir (wird) warm is the natural idiom.
In expressions about physical or emotional states, German often uses the dative of the experiencer:
- Mir ist kalt / Mir ist warm.
- Mir ist schlecht.
- Mir wird schwindlig.
The idea is “to me it is warm”, so mir is dative.
Using mich (accusative) would be wrong here:
✗ dass mich sofort warm wird – ungrammatical in standard German.