the invention consists of radiation shielding materials for shielding in the most structurally robust combination against galactic cosmic radiation , neutrons , and solar energetic particles . materials for vehicles , space structures , habitats , landers , rovers , and spacesuits must possess functional characteristics of radiation shielding , thermal protection , pressure resistance , and mechanical durability . the materials are tailored to offer the greatest shielding against gcr , neutrons , and sep in the most structurally robust combination , also capable of shielding against micrometeoriod impact . the boron nitride nanotube is composed entirely of low z atoms . some of the materials included in this invention are : boron nitride platelets , hot pressed bn , bnnt , bn particle containing resins , bn nanofiber containing resins , carbon fiber reinforced bn containing resins , bnnt containing resins , and hydrogenated bn and bnnt , hydrogen stored bn and bnnt , high hydrogen containing polymer or ceramic matrices , and a combination of these .