Soften the leather by applying a small amount of Rawlings Glovolium Break-In Formula onto your applicator sponge. Starting in the palm of the glove and working outward, cover the entire glove with a thin layer of formula. The Rawlings website cautions that you merely coat the glove and not saturate it. Allow the glove to dry before moving onto the next step.
Play catch with your glove. The more use it gets from catching the baseball, the faster the pocket of the glove will break in. This will also help the inside of the glove form to your fingers, making the motion of closing the glove easier.
Place the plastic over-sized ball into the pocket of the glove. The pocket is found above the heel of the glove and below the webbing.
Close the glove and secure with the strap provided in the package. The strap is made of an elastic material and should be slid over the top of the glove. Set the strap so that it is in the middle of the glove.
Repeat steps 2 through 5 until your Rawlings Heart of the Hide glove is broken in. When a glove is officially "broken in" is up to he owner -- some players like a slightly stiffer glove, while others like a looser glove. Repeat these steps until you have reached your desired result.