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 your 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).