Had to return mattress almost immediately.  Bought 2 Twin Xl to fit my split King Adjustible bed.   The mattresses are listed at 38x80x12.  It should have fit the bed perfectly.   The problem is that the mattress measured 40.5x82x12 making it to big to fit adjustable bed.    Wayfair was quick with the store credit and I used it to purchase a replacement and its dimensions were perfect.   They picked up the mattresses and return is complete.  Great Wayfair customer service.