This action is very instructive in several ways: (1) God considers clothing so vital in this present world that He himself provided it for our first parents; (2) the aprons fashioned by Adam and Eve were inadequate, testifying in effect that man-made efforts to prepare for God's presence will be rejected; (3) the clothing provided by God requires shedding the blood of two animals, probably two sheep. They were thus the first creatures actually to suffer death after Adam's sin, illustrating the basic Biblical principle of substitutionary atonement or "covering" which required the shedding of innocent blood as a condition of forgiveness for the sinner.

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8