GlenDel's core design has 4 sides with different vital positions. This prepares you for shooting deer that would be broadside, quartering away and from a 20 ft. tree stand at 20 yards. By fusing the internal layers to the inner target wall it results in a more uniform layer compression which, in turn, means easier arrow removal. Polyfusion also results in a longer target life and because the layers are fused in place they hold their position. FeaturesOpen layered polyfusion technologyEasy arrow removalLonger target life