The Whaly 500R80 Professional has a foam layer on the inside of the boat, Polyethylene + Polyethylene foam layer, High grade, UV-stabilised Polyethylene (PE), this will be the preferred choice for Professional use as a Work boat or for Rescue operations. Whaly’s, well thought-out design, which emphasises strength and stability, offers many options. A large of inner space for a 5 meter boat!