Defective King mattress, no customer support
Our king hybrid Casper mattress purchased one year ago, developed a huge lump in the center after a move with professional movers, who did not mishandle the mattress. Mattresses that arrive in a box, folded up, should be able to be moved without developing a defect. We have a queen hybrid as well, and it is perfectly fine.
We have slept on it for a month, and also put weights
on it, but the lump has not receded. We contacted the company to get a replacement under warranty and they are not covering the replacement.