Patented current control technology provides ultimate comfort for the patient, leading to better compliance, better results. A proprietary silver mixture and grid pattern on conductive material produce the exact current control desired by the caregiver. A polycoated backing serves as a barrier to additional moisture, while the border around the pattern allows for intentional current roll-off. MultiStick® two-layer adhesive gel eliminates performance problems associated with single-layer gels. The one-piece pad on the Universal Dual size has been scientifically designed to function as two separate electrodes.