teek h foam made from solid residuum has a phrr slightly higher but still less than 60 kw m 2 at the same irradiance level in specific embodiments of the composite materials of the invention the polymer foam has a phrr at an irradiance of 50 kw m 2 of less than 100 kw m 2 less than 60 kw m 2 less than 50 kw m 2 or less than 30 kw m 2 in other embodiments the polymer foam has a phrr at an irradiance of 50 kw m 2 of 10 100 20 100 10 60 or 20 60 kw m 2 the polymer foam contains the aerogel in the composite materials as used herein the term u201c contains u201d means that the polymer foam restricts motion of the aerogel from all sides of the aerogel or all sides except one preferably the polymer foam holds the aerogel immobile relative to the foam by direct contact with the aerogel or by exerting pressure against the aerogel through an intervening material e g a vapor barrier in a particular embodiment the composite material is prepared by foaming the polymer in a space with the aerogel to expand the polymer foam against the aerogel the polymer foam may expand directly against the aerogel i e to make direct contact with the.