This STP device is a unique packer designed with a hollow shaft and wide opening for female-to-male (FTM) stand-to-pee functionality. Designed with function and comfort in mind, the sculpted shape fits into your favorite harness and a stretchy silicone flexes with the body. The soft, pliable silicone, life-like feel and ivory skin tone make it the perfect probe for all-day wear. The hypoallergenic premium silicone is body safe, unscented and phthalate free to keep you most sensitive spots, happy and healthy. Before and after use, wash with soap and warm water and then spray with Mighty Tidy Toy Cleaner (sold separately).