▎ 摘　　要

NOVELTY - Envelope comprises at least one composition chosen from natural and/or synthetic biocompatible materials, and morphological structure of a sharkskin such that it contains micro recesses-protrusions on its surface, which increases its antimicrobial properties. USE - The envelope is used in a envelope product for cardiac pacemakers which does not degrade at least until lifespan of a cardiac pacemaker. ADVANTAGE - The envelope has high antimicrobial properties, does not present any side effects for body by deriving from biocompatible components, and reduces effects of operation which takes place during insertion of cardiac pacemaker into body. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a envelope product comprising an internal chamber for inserting the cardiac pacemaker, a cable output allowing for the cables actuating the cardiac pacemaker to come out of the envelope, and a stitching area for stitching the envelope after inserted to the body following the operation.