The Tantus Echo dildo is flexible with a grooved surface. This dildo is suitable for the more experienced user, and if you were to insert the bullet vibrator in the base of your Echo, then it could also be enjoyed as a dildo vibrator. This Dildo is suitable to use with a harness. Use a water-based lubricant with your Echo and experience the most pleasure and comfort you can from it. Tantus Echo is: allergy friendly, odourless, flexible, can be boiled in water and therefore can quickly reach body temperature. Handmade in the USA, 100 % phthalate- and latex free.