US Patent 10342267 Dual layer slipper sock and method of manufacturing same

A slipper sock is formed from an outer pouch and an inner pouch shaped to receive and encapsulate a person's foot. A border around an opening in the inner pouch is placed over a border around an opening in the outer pouch. The inner pouch and outer pouch are affixed together at the interface of the overlapping borders surrounding the openings of the pouches. The inner pouch which can be made of pile material is then inserted through the opening of and into the outer pouch and spread to conform to the shape of the outer pouch. The border of the inner pouch can form a collar surrounding the opening of the outer pouch.