the elastomeric B segment; the average molecular weight of each A being between about 5,000 and 125,000; B is a polymer block of a conjugated diene, the average molecular weight of the blocks being between about 15,000 and about 250,000; the total of blocks A being less than about by weight of the block copolymer; in addition to the block copolymer a tackifying resin and a particular extender oil,