How to Use the Vac-U-Lock Ultra Harness with Plug
By Motorbunny - New Riding Sex Toys and Sex Machines | Published: 2026-10-22
Category: How-to Guides
Learn step-by-step how to set up and wear the Vac-U-Lock Ultra Harness with its built-in plug for a secure, comfortable fit with your favorite attachments.
Quick answer
To use the Vac-U-Lock Ultra Harness with Plug, first attach the included plug to your Vac-U-Lock dildo, then adjust the harness straps for a snug fit, and finally secure the dildo by pressing it into the harness's O-ring.
Why the built-in plug matters
The Ultra Harness comes with a plug that fits into the back of compatible Vac-U-Lock dildos. This plug prevents the toy from wobbling or slipping out during use, giving you more control and confidence. It also makes swapping attachments quick—just pull out the plug and insert a new dildo.
Choosing the right dildo
This harness works with any Vac-U-Lock compatible dildo that has a receiving hole at the base. If your dildo does not have that hole, the plug will not fit. Check your toy's packaging or description to confirm Vac-U-Lock compatibility before starting.
Step-by-step setup guide
- Insert the plug into your dildo: Take the plug that came with the Ultra Harness and push it firmly into the receiving hole at the base of your Vac-U-Lock dildo. You should feel it click or seat fully. If the plug does not go in all the way, check that you are using a Vac-U-Lock compatible dildo with the correct hole size.
- Adjust the harness straps: Hold the harness against your body and pull the straps to fit snugly around your hips and waist. The O-ring should sit centered over your pubic area. Tighten the straps enough to prevent shifting, but not so tight that they dig in. Test the fit by moving around—if the harness slides, tighten the straps a little more. If it pinches, loosen them slightly.
- Attach the dildo to the harness: With the plug already in the dildo, push the plug through the O-ring from the inside of the harness until the dildo base is flush against the ring. You should hear or feel a click as it locks into place. If the dildo feels loose after attaching, remove it and check that the plug is fully seated in the dildo. A loose connection can cause the toy to slip during use.
Product fact
- Vac-U-Lock - Ultra Harness - With Plug Black: This harness comes with a plug, making it a versatile addition to your collection. The included plug gives you a more stable connection and lets you switch between different Vac-U-Lock attachments without buying extra parts.
Vac-U-Lock - Ultra Harness - With Plug Black
