https://www.youtube.com/watch?v=K35wzsci_10&t=71s
https://mamaruga.com/wp-content/uploads/2017/11/Dual-adjustment.TUV-Javitott-copy.pdf

Mamaruga Zensling is the perfect carrier from birth, even if you are a beginner or advanced babywearer. This type of carrier is just like a big cuddle which naturally creates nurturing environment for your baby.
Unique, amazingly soft, comfortable, adjustable. Zensling is your perfect, first time, easy to put on carrier, from newbornhood onwards, made from uniquely designed combed cotton.