WHAT IS this?

I am cleaning out a spare bedroom to make it nicer for relatives who will be staying with us . I came across this gift that I never used. As I began to unfold it I thought it would be a lightweight blanket....like for on the couch or whatever. Yet I have opened it fully and it has an opening that I am not sure of its purpose. Someone please enlighten me about this item.

20240614_151513.jpg Thanks 😊
https://www.luxedh.com/products/burberry-mega-charcoal-check-merino-wool-cashmere-cape-shf-22875An expensive cape.