"Serta is suing Casper for patent infringement in a showdown between the country's biggest mattress brand and the leading startup attempting to disrupt it"

MA:

Casper first unveiled the high-end Wave model in August with prices ranging from $1,000 to $2,250, around double that of its regular mattresses. Its design is meant to conform to the shape of a sleeper's body with alternating layers of soft and firm material.

Serta claims this construction too closely resembles its own "Channel Cut Technology,"