There is a phrase said by a native speaker in a video and the subtitles (not
autogenerated) were:

そんなゴミの中で **寝てて** 快適なの。

I cannot find what does this second て mean. The form 寝て must refer to
continuous action, but then before the 快適 adjective there is one more て. What
is the meaning and the name for this construction?
CC BY-SA 4.0
2022-12-07T22:07:27.380
97534
2022-12-08T15:37:52.490
54917
question
て-form
what does second て mean after て-form?