Curve Toys Jock Squeezable Tunnel Double Masturbator . Tightening and Vibrating Masturbator. 8 tightness settings. Small and large openings for extra stimulation Soft, textured tunnel. Rotate ring on outer case to adjust tightness. Non-slip outer case. Phthalate-free. Care and Maintenance. Care Instructions: Clean with soap and warm water or toy cleaner. Use with any water-based lubricant.