Hi all, what's the diff/pros & cons between yaolan and baby cot? Heard yaolan can prevent flathead!

I let my baby slp in yaolan during nap time then night time sleep in baby cot. U will have difficulty make baby slp during the hot weather in the afternoon.. put baby in yaolan will make baby sleep better coz it’s more comfortable and cooling in the afternoon. Flathead is unless u let ur baby slp straight all the time.. since birth let baby head turn left or right slp.