Tenga Cup Reusable Vacuum Ultra - Male MasturbatorThe noticeable difference in how the sleeve sits and moves, is how it is built around a wider internal chamber. It has pronounced nubs and ridges that line the interior, providing real texture without anything that tips into discomfort. The sleeve is made from TPE, skin safe and soft against the skin, and sits inside a solid ABS outer casing that holds well in the hand. The Air Tech airflow structure draws air through internal chambers as you move,