Shower Strap Bathmate. The Bathmate shower strap is designed to give you all the support you need to make your penis pump experience a seam free one. This shower strap is designed to fit the Bathmate hydropump range and ensures practical help and comfort where you need it most. This strap holds the pump around your neck allowing you to multitask easily. This shower strap can be used with a wide range of Bathmate hydropumps from the X40 and X30 to the Goliath and the Hercules. Once the penis hydrotherapy pump is filled with water it becomes heavier. The strap helps to alleviate some of the weight for a light and easy experience. This strap is perfect for use in the shower and the materials are designed to be immersed in water easily.