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Vac-U-Lock 8 UR3 Cock with Strap-On by Doc Johnson - Strap On Sextoys
Vac-U-Lock 8 UR3 Cock with Strap-On by Doc Johnson - Strap On Sextoys

Vac-U-Lock 8 UR3 Cock with Strap-On by Doc Johnson

$109.99
$109.99

Vac-U-Lock 8 UR3 Cock, with Strap-On Flesh combines lifelike UR3 material, with Doc Johnson's secure attachment system for realistic penetration. Ultra Harness adjusts up to 53 inches for comfortable strap-on play and confident thrusting power.

Key Features:

The 8 inch UR3 dildo delivers realistic penetration with lifelike texture and veining for authentic vaginal or anal stimulation during strap on play between partners.

Secure Vac U Lock system ensures the dildo stays firmly attached to compatible harnesses during vigorous thrusting and penetration without slipping or detachment issues.

Ultra Harness accommodates waists up to 53 inches with adjustable straps for comfortable positioning during extended penetrative sex sessions with your partner.

Phthalate free UR3 material provides body safe penetration with soft realistic texture that mimics natural skin sensation for enhanced arousal during intimate encounters.

Complete strap on kit enables immediate penetrative play with included harness dildo and Vac U Lock plug for hands free thrusting and orgasmic stimulation.

Vendor: Doc Johnson
SKU: STR-117-B-NOATTRIBUTES-SHOP-NONE-19687
Availability: Out Of Stock
Product type: Strap On Sextoys
Please hurry! Only 0 left in stock

Doc Johnson's Vac-U-Lock 8 UR3 Cock with Strap-On combines a realistic 8-inch attachment with a secure harness system for couples seeking confident, stable penetration. UR3 material flexes and warms to body heat while the vacuum-lock connection prevents slipping during thrusting.

Why choose the Vac-U-Lock 8 UR3 Cock with Strap-On by Doc
  • Realistic sensation: UR3 material mimics natural cock texture and flexibility
  • Secure attachment: Vacuum-seal system prevents slipping during vigorous thrusting
  • Adjustable fit: Harness supports waists from 26 to 53 inches comfortably
  • Consistent contact: Locked-in place design maintains G-spot or prostate pressure
  • Body-safe material: Phthalate-free UR3 warms to body temperature
  • Easy swaps: Powder dispenser included for smooth attachment changes
  • Stable thrusting: Even pressure distribution across hips during deep penetration
📦 Discreet plain-wrapped delivery  •  💳 Private billing  •  ↩️ Easy size-swap returns

What it does

During penetration, the realistic UR3 cock slides deep inside your partner while the flexible material responds to their body heat and movement. Textured ridges on the shaft create friction that mimics natural penetration, and the lifelike head pushes against sensitive internal spots with each thrust. Because the Vac-U-Lock connection holds firm, you stay locked in position without shifting, so you can focus on rhythm and angle without fumbling or readjustment.

Your partner feels consistent pressure against their G-spot or prostate as you control the depth and force from the harness. Leaning forward hits different angles; staying upright drives deeper. Pornhub Sextoys offer similar realistic designs if you want to explore other styles. Arousal builds as the girth stretches them gradually, and the secure setup lets you both relax into longer, more satisfying sessions.

Specifications

  • Insertable length: 8 inches
  • Material: Phthalate-free UR3
  • Harness waist fit: 26 to 53 inches, adjustable nylon straps
  • Attachment system: Vac-U-Lock vacuum-seal connection
  • Includes: Powder dispenser for attachment changes

Fit and sizing

Measure your waist snugly around the narrowest point to find your harness size; the Ultra Harness adjusts from 26 to 53 inches, so it fits most body types. Smaller frames and slighter builds sit comfortably at the lower end, while larger waists use the full adjustment range. The key is comfort and stability—a harness that sits too loose will shift during thrusting, and one too tight restricts movement. Cockringshop specialises in products for men and couples, so sizing advice is available if you're between sizes. Choose support over stretch; the straps should feel secure but not restrictive, letting you thrust with confidence without distraction.

How to use it

Wrap the Ultra Harness around your waist and thighs, then adjust the straps so the O-ring sits comfortably at your pelvis. Insert the Vac-U-Lock plug into the attachment base and push firmly until you hear or feel the vacuum seal click into place. Apply plenty of lube to the UR3 cock, then guide it slowly into your partner while they relax and open up. Start shallow to let them adjust to the girth, then gradually push deeper as their arousal grows.

Once you find your rhythm, the harness lets you control angle and force without thinking about the attachment. Your partner's breathing quickens and muscles tense as you hit the right spots. After use, clean the attachment and harness with warm soapy water and dry thoroughly before storage. Reapply powder between uses to keep the Vac-U-Lock connection smooth.

Feature breakdown

Feature Specification Benefit Experience
UR3 Material Lifelike phthalate-free compound Mimics natural cock texture and flexibility Warm, responsive penetration that feels realistic
Vac-U-Lock System Vacuum-sealed attachment base Prevents slipping during hard thrusting Confident, uninterrupted fucking without fumbling
Ultra Harness Adjustable 26–53 inch waist fit Stable support for deep, vigorous penetration Comfortable extended sessions without pressure points
8-Inch Length Full insertable realistic shaft Reaches G-spot and prostate zones Satisfying depth and fullness throughout session

Who it suits

Couples seeking realistic strap-on play will appreciate how the UR3 material flexes like skin and warms to body heat. Beginners benefit from the secure attachment system that eliminates fumbling and worry, while experienced users love the lifelike sensations and stable harness for longer sessions. Anyone frustrated with basic strap-ons that slip or feel stiff will notice the difference immediately—the Vac-U-Lock connection and flexible material transform the experience.

This system is less suited to people who prefer rigid, non-flexible attachments or who don't need anatomical realism. If you're looking for something purely functional without realistic texturing, or if you have a waist outside the 26–53 inch range, explore other harness options first. For most couples wanting confident, satisfying penetration with a strap-on, this is a solid choice.

Tested and quality-checked

Every new line we stock is inspected by hand before it goes live — we check the build, the finish, and the materials, and we confirm it is safe and fit for how it will be used. Nothing is used for its intended purpose; it is examined, checked, and re-boxed. What that means for you is simple: you receive a piece we have already vetted, not a guess off a supplier's pallet. See how we test every product →

How it compares

Realistic strap-on attachments like this one flex and warm to body heat, mimicking natural sensation and allowing deeper, more responsive penetration. Non-realistic designs—often rigid or smooth without textured detail—offer simpler aesthetics and easier cleaning but less lifelike feedback during thrusting. Adam Eve Sextoys include both realistic and minimalist styles, so you can compare the feel. Choose based on whether you value lifelike sensation and flexibility or prefer a streamlined, non-anatomical design.

Please read — safety first. Put the ring on before you are fully erect and use plenty of water-based lubricant so it slides on without pinching. Keep wear time short — no more than 20 minutes while you are getting used to it, and never fall asleep wearing one. Take it off straight away if you feel numbness, coldness, a change in colour, or any pain, as these mean blood flow has been cut off too far. Never share between partners without cleaning the item first or using a fresh condom. As porous materials can harbour bacteria, use a condom over them for sharing or easy clean-up. This information is general in nature only and is not medical or professional advice, and does not take your personal circumstances into account. Stop use and speak with a qualified medical professional if you have a relevant health condition, take medication for erectile function or blood pressure, or notice pain, numbness, or discolouration that does not settle.

What you can use it with

Pair this strap-on with vibrating cock rings worn by the penetrating partner to add internal sensation and stimulation during thrusting. Couples Intimacy Kits often bundle complementary items designed to enhance shared pleasure. Prostate massagers or internal vibrators for the receiving partner can intensify their experience alongside the strap-on's penetration. These combinations create more varied sensation and can lead to stronger arousal and orgasm for both partners.

More from Doc Johnson

Doc Johnson specialises in premium American-made adult toys and harness systems for couples and solo users. Doc Johnson offers a range of realistic attachments, harnesses, and penetrative sex toys designed for comfort and lifelike sensation. Explore their full collection to find other styles and sizes that suit your preferences.

Read more before you buy

Positioning and angle matter when using a strap-on, and the way you thrust affects sensation for both partners. Strap On Positions covers techniques and angles that maximise pleasure and help you find what works best for you both.

Why buy the Vac-U-Lock 8 UR3 Cock with Strap-On by Doc Johnson

Ready to find a ring that actually fits? Order the Vac-U-Lock 8 UR3 Cock with Strap-On from The Cock Ring Store—genuine, function-tested, and quality-checked. Cockringshop delivers discreetly across Australia in plain packaging, so your order arrives privately and on time. Precise sizing, honest reviews, and discreet delivery Australia-wide. The Cock Ring Store ships discreetly Australia-wide.

Shipping Information & Policy


Cockringshop.com.au ships with Australia Post. We ship from Sydney.

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 1-6 business days after shipping, but may subject to any postage carrier related delays beyond our control.

Free standard shipping on orders shipped within Australia above $200. For orders below $200 standard shipping within Australia is $12.95 and will be added at checkout.

Orders addressed to P.O box, G.P.O box or Parcel Collect will be handled by Australia Post. Extra time should be allocated for these orders.

Shipping Transit Times (Including Free Shipping)

Shipping time refers to the estimated time that it will take to deliver your order after it’s ready to ship (Please note this does not include time to process your order). Shipping time does not commence after your order is put through but begins the moment your order has been processed and is ready to dispatch via the our freight carrier..

1. Major City & Metro Areas (within Australia)

All in stock orders are generally processed on the same day the order was placed on business days for orders received before 12pm. Generally, orders are processed and shipped the same day or next business day.

Orders are typically received 1-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the nearest depot location.

2. Rural Areas (within Australia)

All orders are generally processed on the same day the order was placed on business days before 12pm.

Generally, orders are processed and shipped the same day or next Business day.

Packages below 2kg are usually received 3-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the local Australia Post depot.

International Shipping

The price for international shipping is AU$12.95 for orders equal to or below 0.399kg (399grams), and AU$22.95 for orders with a total weight equal to or above 0.4kg (400 grams).

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 6-30 business days after shipping. 

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from your nearest delivery depot.

Please note in regards to all orders

– These expected delivery dates/times are based on carrier shipping practices, your destination, and the items in your order.

– Expected delivery dates are estimates. Orders can be delayed due to fraud verification or the time of the order being placed. Items that are not regularly stocked cannot be held to the expected delivery dates.

– Orders may be delivered in separate shipments.

– The order cut off times are based on normal Business Hours and exclude weekends and Holidays: Monday – Friday 12 pm

– When your order ships you will receive an email from us with a link to track your order.  If you receive your tracking number before 6 pm (AEST) it may not be updated on the Carrier’s website until that evening.

Due to large amounts of online credit card fraud, all orders are subject to approval by our payment verification department. We will notify you by phone or email should your order be delayed.

Returns Policy


We have a 14 day return policy, which means you have 14 days after receiving your item to request a refund for any defective products.

Returns and exchanges are only available for faulty items, goods not as described, or in some instances, for incorrect sizing.

Due to health and safety regulations, cockringshop.com.au cannot resell any returned or exchanged products.

This policy is in place to prioritise your well-being and ensure that you receive the highest standard of hygiene and quality in all products.

To be eligible for a refund, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging.

You’ll also need the receipt or proof of purchase. We do not issue refunds for change of mind or incorrect choice.

Under Australian Consumer Law, we are not obliged to accept returns for “incorrect choice” or “change of mind” so please choose your products carefully.

Any freight and insurance costs to return the item to us are at your expense. This includes the liability for any lost freight – send via registered post.

If your return request is accepted, we will provide you with all instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items

We do not accept returns for any products that have change of mind, damaged products, or for products that have been used or do not have their original packaging.

Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.

Refunds

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 7 business days.

Please remember it can take some time for your bank or credit card company to process and post the refund

Frequently Asked Questions

How does the Vac U Lock 8 UR3 Cock with Strap On Flesh enhance penetrative stimulation?
The realistic UR3 material delivers authentic penetration sensations with lifelike texture and veining that stimulates vaginal or anal walls for intense arousal and orgasmic pleasure.
What makes the Vac U Lock 8 UR3 Cock with Strap On Flesh secure during use?
Advanced Vac U Lock technology creates a vacuum seal that keeps the dildo firmly attached to the harness during vigorous thrusting without slipping or detachment.
Why is the Vac U Lock 8 UR3 Cock with Strap On Flesh effective for couples play?
Adjustable harness design accommodates various body sizes while the realistic dildo enables penetrative stimulation for partners seeking hands free thrusting and shared orgasmic experiences.
Which body areas does the Vac U Lock 8 UR3 Cock with Strap On Flesh stimulate effectively?
Eight inch length targets deep vaginal or anal penetration while the realistic girth stimulates sensitive nerve endings for intense arousal and climactic pleasure during intimate play.
Does the Vac U Lock 8 UR3 Cock with Strap On Flesh provide realistic sensations?
Lifelike UR3 construction mimics natural skin texture with detailed veining and anatomical accuracy that delivers authentic penetration sensations for enhanced sexual satisfaction and arousal.

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We ship same day on all in-stock orders placed before 12pm! Free shipping on all orders above $200.

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We ship our full range of products worldwide with fast dispatch for orders before 12pm Sydney EST!