What do you want this toy to feel like? Do you want something softer, with more diffuse vibration? Then you want a stimulator made of jelly, rubber or silicone. Most strap-ons are made of one of these materials. Have you been looking for a clitoral toy that you can use in the water? Then a waterproof toy is best. Some wireless bullets and finger massagers have rubber-sealed battery compartments, making them appropriate for water use. Do you prefer something that transmits a stronger vibration? Generally something made of plastic or metal will have the strongest vibration, but can also numb. To avoid this, look for toys with a pulsatronic controller. Many rigid vibes come with soft sleeves, which may diffuse vibration slightly, but be more comfortable.