Many are described as fully waterproof for bath or shower use and are labeled easy to clean. Typical care instructions note washing with mild soap and water and following the manufacturer's cleaning recommendations.
Common materials include silicone for many rechargeable massagers and TPR (thermoplastic rubber) for strokers; some listings also note recycled rubber content.
Listings describe multiple vibration settings and arrangements such as dual motors with independently vibrating tips, up to 10 different settings, and separate controls on each end.