F.I.T. elbow, forearm and bicep construction/Conforming arm and elbow to create a custom fit, F.A.V. system/Comfort through superior air circulation with added protection, Griptonite on the forearm areas/Locks in the perfect fit and keeps pad from sliding down the arm, Reebok Play Dry/Wicks moisture away from the body, Ergonomic and anatomical elbow cap design/Excellent fit and feel, Full PE protector on the elbow cap/Better protection.