a composite film suitable for shrink - packaging bony cut meat , including at least one oxygen - impermeable layer , and at least one heat sealable , surface layer formed of a thermoplastic resin , said film having the following physical properties : c . sub . l ≧ 15 c . sub . t ≧ 15 80 ≦ s . sub . l ≦ 250 80 ≦ s . sub . t ≦ 250 t ≧ 1 . 2s . sub . l + 60 t ≧ 1 . 2s . sub . t + 60 wherein c l and c t represent the thermal contraction percentages of the film measured in 90 ° c . hot water in the longitudinal and transverse directions , respectively , s l and s t represent the thermal contraction stresses of the film measured in 90 ° c . hot water in the longitudinal and transverse directions , respectively , and t represents the piercing strength of the film measured in 90 ° c . hot water .