NMD NJOY PE BodyboardNMD NJOY PE Bodyboard The NMD Njoy bodyboard is perfect for those seeking to improve their skills. With a polyethylene core and single stringer, this board allows riders to conquer more challenging conditions. Bodyboard Features; Inner Core 2. 4lb Polyethylene Stringer 1 x EXT Stringer Rails 55 45 Double Rails Channels Graduated Slick HDPE Deck IXLPE Crosslink Tail Clipped Crescent Additional Features XFL Armour.