It is a baby carrier vest which is meant to keep the baby warm during cold weather and it's able to fit most of the soft baby carriers. You can get this item here: http://www.carrymeaway.com/product/boba-baby-carrier-vest/
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This is called Boba Baby Wrap. You can try it out at the showroom before deciding if you and your baby are comfortable to use it. http://www.babyslingsandcarriers.com/baby_wrap_carriers
Don't think we need this in our weather though. Probably for travel!
thanks