I am not sure about the contents in the box. My box was delivered with some sort of spill all over the box. It’s chemical but thought odourless in the beginning. 
I brought it inside and tried to open the box but the spill was over the whole box. I put in a bag in the back room.  Hopefully the box would dry. I entered the room today. The room was filled with a strong chemical smell. I immediately took box back outside. Opening all the windows and doors. I am one handed recovery from surgery. I am bundled in a parks with winter boots. Airing out my House. It’s 0 today!!!!
Contacted Wayfair customer service. The attendant was extremely helpful and sympathetic. Box is going to be picked up and the spill will be pin pointed. 
She reduced the return but really it’s the fact that the box should have never been left in that condition and what have I exposed myself and family ( for days)  is more of a concern than a discount.