n is l, A is a thermoplastic polymer block, and B is a thermoplastic polymer block having a softening point of at least about 35C., said softening point being at least 10C. below that of the A block, and which comprises from about 50 to about 97 weight percent of said copolymer, said foamed product having a density of about 1.0 lb./cubic foot to about 45 lbs/cubic foot. 2.