Experience one of the best harnesses out there. The Vac-U-Lock system is so simple to use, It consists of a harness with an attachable plug that fits into the base of all Vac-U-Lock compatible accessories. The incredibly user-friendly Ultra Harness 2 is a unisex, g-string style strap-on system with an adjustable waist that fits up to 44 inches, and an open crotch for easy access. The plug attachment is included, the dildo is not. Experience it for yourself, and have a look at some of our Vac-U-lock compatible dildos and accessories to go with your new harness. Enjoy!