From Field Logic:

Shoot at all 4 sides! Five Spot - the original BLOCK design that spreads your shooting out into five different "spots" on the target. Four of diamonds - opposite side of the five spots, the four diamonds let you shoot into untouched foam. Vitals - practice for the real thing by shooting at a deer silhouette with anatomically correct vitals. Tree stand vitals - rotate so the internal layers are vertical and shoot down at a deer silhoutte with condensed vitals to imitate shooting from a tree stand

PosiLock Compression System holds internal open layers in place and eliminates "slivering"