No one will ever know! Smartballs measure 4" long and has a diameter up to 1". They have a silky-soft surface and are made of Elastomed, a material widely used in the medical industry. Smartballs are skin safe, and easy to clean. Each package comes with a sample packet of lube and an instruction brochure. They can be worn for several hours. Each movement causes the metal ball inside the Smartballs to vibrate for the heighten pleasure of intimate massage. Recommended by midwives, these provide a targeted workout for the pelvic floor. Smartballs are the quietest love balls in the world.

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