Golf Swing Training Device

FIG. 1 is a first perspective view of a golf swing training device in a flat state according to my new design; FIG. 2 is a second perspective view thereof in the flat state; FIG. 3 is a third perspective view thereof in a sleeved state; FIG. 4 is a front elevation view thereof; FIG. 5 is a rear elevation view thereof; FIG. 6 is a left side elevation view thereof; FIG. 7 is a right side elevation view thereof; FIG. 8 is a top plan view thereof; and, FIG. 9 is a bottom plan view thereof.