GRP/Fibreglass. A good material for lightweight offshore boats and, provided any knocks and scratches are touched up on a regular basis, will give many years of service. We do not recommend the use on large inland waterways boats though - not really tough enough for "Contact Boating".
This explains better
http://en.wikipedia.org/wiki/Boat_building
or
http://www.atlanticboatingnews.com/B...ID=83&MagID=10