Zolo Male Masturbator Clear Backdoor sleeve from X-Gen Products. The Zolo Realistic Backdoor Squeezable and Textured Stroker is a dual density transparent stroker that mimics the look and feel of a butt. The clear non-phthalate material lets you see yourself stroke, while the included renewing powder and travel bag help keep your stroker dry, clean and always ready for action! See yourself stroke.