That depends on a couple of things. DO you want a stiff quiver then use heavy leather. Your arrows will move around a lot. Some like a thinner leather so it collapses on the arrows so they don't move around much. Will you be putting a fur lining in it? That helps stiffen a thin one up, muffles sound and helps keeps arrows from moving all over. You can put a strap in your quiver to help hold arrows in place. If your just using it for practice then heavy and open will serve you fine.