Your Solo Ski is made by a process called rotational molding. e entire hull is all one piece. It is made of polyethylene, one layer of outer plastic resin that contains the color, and a layer inside that is foamed. is multi layer process greatly increases the strength of your hull while at the same time providing a margin of safety against cracks. With proper care the hull will last for many years of use. e multi layer process also greatly aids in otation. Your Solo Ski has the foam layer on the entire inside surface. If you cut a Solo Ski in pieces and put each piece in the water they will all oat. is provides a level of safety you do not get with any single layer kayak. Your Solo Ski also has foam blocks installed for added otation and safety. Do not remove these blocks of foam.