I still think it’s better to make them sleep in flat surface. Otherwise it’s difficult to make them sleep when outside
Yaolan. My lo sleep in yaolan close to one year old before I gradually transit her to sleep in baby cot.
If colic then u have to find the root cause of the problem n solve it instead
Yaolan works well for me. My lo has been sleeping in it for 1 year.
Yaolan
julie