This mat is a protective cushion for the area where your in-ground Tumbl Trak bed ends before your pit begins, “The Black Hole”. This mat is custom made for your space and can either fasten via hook fastener to a resi mat or transition past the concrete lip into a loose foam pit.  The idea of the “Black Hole Mat” is to protect those gymnasts that miss their mark coming off the Tumbl Trak.