Providing support to his whole unit while increasing blood flow, the Hung Super Stud Sling adds constriction for a harder, longer lasting erection plus lots of pleasure for whoever's on the receiving end, thanks to a powerful little bullet vibe in a nubby-textured holder. The vibe sits at the perfect position to transfer tons of stimulation to the clit or perineum, depending on how you're using the Stud. It's nice and stretchy, made from super soft, safe and hypoallergenic silicone, so it's extra easy to put on and remove once playtime's over. Use a good water based lube if needed to keep the material strong. Vibe takes 3 LR44 button cell batteries, which are included. One size fits most.