K-1 Legacy Club26.5 lbs (12 kg) Fiberglass on a core mat Vacuum bagged with polyester resin Blue seam line K-1 Legacy Performance25.3 lbs (11.5 kg) Infusion grade foam core Composite hybrid of fiberglass, carbon fiber, and Kevlar Vacuum infused, heat-cured epoxy Black seam line K-1 Legacy Ultra24 lbs (11 kg) Nomex honeycomb core Woven Kevlar fabric Vacuum bagged, heat-cured epoxy Red seam line K-1 Legacy Marathon17.6 lbs (8 kg) Nomex honeycomb core Extra-fine woven Kevlar fabric Minimum weight for competition Red seam line K-1 Legacy Elite22 lbs (10 kg) Carbon with Kevlar reinforcement Epoxy/vacuum bag construction Red deck with black hull