The Feel of SmartDesign™ Worry-Free Shaving! Our exclusive microfine wires make getting a close shave easier on your skin. The safety wires help protect you from nicks, cuts and uncomfortable razor burn. + Aloe Enriched. Our Ultra Glide® strip with aloe lets the pivoting blade glide easily, leaving your skin smooth to the touch. These refill blades fit all Silk Effects razors.