A hot-water sterilized package includes a container having a barrier layer filled with contents, wherein the barrier layer contains 96 mass % or more of a modified ethylene-vinyl alcohol copolymer based on the resin total, the modified ethylene-vinyl alcohol copolymer is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) through (3), a degree of saponification (DS) defined by a following formula (4) is 90 mol % or more, and in measurement using a differential scanning calorimeter (DSC), crystalline melting enthalpy (Δ；HA: J/g) during temperature rise in a hydrated state and crystalline melting enthalpy (Δ；HB: J/g) during temperature rise after drying and melting followed by rapid cooling satisfy following formulae (5) and (6). A container constituting such a package has excellent in oxygen barrier properties even after hot-water sterilization, and thus degradation of content quality is inhibited for a long period.18≤；a≤；55 ； ；(1)0.01≤；c≤；20 ； ；(2)[100−；(a+c)]×0.9≤；b≤；[100−；(a+c)] ； ；(3)DS=[(Total Number of Moles of Hydrogen Atoms in X,Y, and Z)/(Total Number of Moles of X,Y, and Z)]×100 ； ；(4)Δ；HA/Δ；HB≥；0.5 ； ；(5)Δ；HB≥；70 ； ；(6).
