Preserve the integrity of your glove throughout the offseason and after rigorous games by inserting the Markwort(R) Glove Guard. The guard's plastic shell helps retain the shape of your glove's interior to maximize its longevity while also deepening its pocket for added performance. Superior Glove Maintenance: Plastic shell sits firmly inside your glove to maintain its structure when not in use Helps deepen its pocket for increased performance while maximizing its durability Utilizes a hook-and-loop strap system to wrap around the glove and keep the guard secure Sizing Information: Black Guard: Ideal for gloves up to 12'' Blue Guard: Ideal for gloves 12'' and larger