FIG. 1 is a perspective view showing the left side of an upper arm protection system according to the invention.

FIG. 2 is a front elevation thereof.

FIG. 3 is a rear elevation thereof.

FIG. 4 is an alternate rear elevation thereof.

FIG. 5 is a left side elevation thereof.

FIG. 6 is a right side elevation thereof.

FIG. 7 is a top front perspective thereof.

FIG. 8 is a bottom rear perspective thereof; and,

FIG. 9 is a perspective view thereof as worn by a user.

Not illustrated is the right side of an upper arm protection system, which is a mirror image of the left side. The broken lines illustrating the user depict environmental subject matter only and form no part of the claimed design.