this invention relates to a heat - shrinkable film consisting essentially of a blend of 99 . 5 - 98 . 5 weight % of linear low or medium density polyethylene and 0 . 5 - 1 . 5 weight % of one or more copolymers of ethylene with a monomer selected from vinyl acetate and acrylic acids or esters , where said film has been cross - linked to the degree induced by an irradiation dosage of about 1 to 5 megarads .