Our vibe sleeve toys feature a variety of surface textures. These toys are intended for use with a small personal bullet vibrator of your choice. They were designed with intent for use with the WeVibe Tango (because that’s the model we personally own) but they will accommodate other similarly shaped bullet vibes. We can’t recommend any particular other brands personally, unfortunately, because we just don’t own any others. The vibe cavities are also shaped so that one can insert a finger inside if that’s the way you prefer to play with it. They are fun for both internal and external use. A WARNING! We did not design these toys for anal penetration! They do not have flared bases that would make them anal safe, so please be aware of that feature! They are safe for vaginal penetration.