The Xtreme Unhookingmat Cover is twice as thick as its predecessor. This is because 420d material was used instead of 210d material. The Pro Line Xtreme Protection Unhookingmat is equipped with a handy cover with zippers and Velcro, no fish that escapes it. The Pro Line Extreme Unhookingmat MKII is also equipped with a Carp Care bag including zipper. Just like its predecessor, the Pro Line Extreme Unhooking mat has raised edges. The foam rubber mat is sealed in an extremely sturdy plastic bag, this prevents the water from drawing into the mat.