Remfry Arm GuardThere's a fine line between the relative safety of the batting gloves and the exposed wrist and forearm when that nasty short ball rears up unexpectedly. Remfry arm guards will protect both of the bones running up your forearm (radius and ulna), as well as the elbow joint where that not so humorous humerus bone connects. Getting the right sized guard is important for both comfort and protection The below sizing recommendations are guidelines only. We