Design

Queen King Big Size Double Controllers Heated Mattress Pad
https://www.bstherm.com/products/queen-king-big-size-double-controllers-heated-mattress-pad/

A big size heated mattress pad provides consistent heat distribution, maintaining warmth throughout the full surface of the mattress, and providing a comfortable resting environment. It is usually constructed with qualities that make it simple to transport and store, such as a collapsible shape that does not take up much room. Some heated mattress designs allow for machine washing and drying, making cleaning and maintenance convenient and extending the mattress's lifespan.