K-2 Legacy Club39.5 lbs (18 kg) Fiberglass on a core mat Vacuum bagged with polyester resin Blue seam line K-2 Legacy Performance38.5 lbs (17.5 kg) Infusion grade foam core Composite hybrid of fiberglass, carbon fiber, and Kevlar Vacuum infused, heat-cured epoxy Black seam line K-2 Legacy Ultra33 lbs (15 kg) Nomex honeycomb core Woven Kevlar fabric Vacuum bagged, heat-cured epoxy Red seam line K-2 Legacy Marathon29 lbs (13 kg) Nomex honeycomb core Extra-fine woven Kevlar fabric Minimum weight for competition Red seam line K-2 Legacy Elite35 lbs (16 kg) Carbon with Kevlar reinforcement Epoxy/vacuum bag construction Red deck with black hull