Mattress for providing couch like comforts to user, has knee support zone interposed between soft thigh support zone and softer ankle support zone and has hardness greater than both zones

摘要

A mattress (1,2) has a knee support zone (KnZ) interposed between a soft thigh support zone (BOz) and a softer ankle support zone (UsZ) and has hardness greater than both zones. The knee support zone has a length ranging from 15 to 25 centimeters or 17 to 22 centimeters.