Pleasure Tunnel Vagina - for the Autoblow A.I. The pleasure tunnel with vaginal opening is made from a skin-like material that feels ultra-realistic, adapts to any penis size, and snugly envelops your best piece. This sleeve is a pleasurable addition to the Autoblow A.I. masturbator. The casing is made of soft silicone material and has been specifically designed for the Autoblow A.I. This interchangeable sleeve features a textured interior with nubs. During masturbation, it feels as if you are having sex with a real woman. Our recommendation: Before indulging in this delightful sensation of masturbation, apply as much lubricant as desired to the opening and the penis. It doesn't get much more realistic than this.