Silicone trainers are designed for beginners to "train" themselves for backdoor sensations, and helps with allowing for larger girth by teaching the sphincters (fun fact, there's two of them) to relax. Training should be done gradually over time. These plugs can also be used as stand alone toys for enhanced pleasure and pressure, so feel free to experiment and explore new heights of pleasure with this graduated set of booty plugs made with silky, non-porous silicone. Each plug is tapered for easy insertion with a thick, flexible shaft and flared base to hold the toy in place.