Our CinchFit Sheets fit perfectly on odd shaped mattresses like those found on boats! We make Universal Sized V Berth Sheets to help make ordering sheets for your boat easy. We are boat bedding experts and can make custom boat sheets with no template. Our sheets conform to mattresses for a snug fit and helps to easily make boat beds. See our boat bed making video HERE. Learn more about our CinchFit Fitted Sheet Design HERE.