Vac-U-Lock Dual Density Dildo Set by Doc Johnson

Choosing the right dildo set can feel overwhelming when you want realistic sensation, versatility, and control. Vac-U-Lock Dual Density Ultraskyn Set delivers three body-safe attachments in graduated sizes, letting you explore at your own pace with a harness system that adapts to any scenario.

What it is

Vac-U-Lock Dual Density Ultraskyn Set is a three-piece dildo collection engineered by Doc Johnson for realistic, progressive exploration. Each attachment combines a firm internal core with a soft exterior, mimicking natural anatomy while remaining completely body-safe. The color-coded design—pink, blue, and purple—makes selection intuitive. All three fit the same Vac-U-Lock harness system, so you can swap attachments instantly without interruption or mess.

What sets this kit apart is its graduated approach to penetrative play. The pink attachment measures 8 inches, while both the blue and purple options are 7 inches—the purple offering a slimmer profile for those preferring a narrower experience. See the full BDSM Australia range of Sex Kits to compare other harness-compatible systems and multi-piece options.

Key features

• Dual-density construction: Firm core supports realistic penetration while the soft outer layer delivers genuine skin-like texture and comfort.
• Three graduated sizes: Pink 8-inch, blue 7-inch standard, and purple 7-inch slim allow you to progress at your own pace or match your mood.
• Vac-U-Lock compatibility: All attachments lock into the harness system instantly, enabling rapid changes and hands-free or partnered play.
• Body-safe material: ULTRASKYN is phthalate-free and non-porous, making it easy to clean and safe for all body types.
• Complete package: Harness, lubricant, toy cleaner, and maintenance powders arrive ready to use immediately.

Specifications

• Pink attachment: 8 inches long, 5.5-inch circumference
• Blue attachment: 7 inches long, 5.5-inch circumference
• Purple attachment: 7 inches long, 5.5-inch circumference, slimmer profile
• Material: ULTRASKYN, phthalate-free, dual-density construction
• Harness: Supreme model with 69-inch adjustment range, multiple O-ring sizes included
• Box contents: Three dildos, harness, water-based lubricant, toy cleaner, refresh powder, maintenance powder

How to use a sex kit

Start by selecting the attachment that matches your comfort level or desire. Secure it to the Vac-U-Lock harness by aligning the connection and pressing firmly until you hear or feel it lock. Adjust the harness straps for a snug, comfortable fit against your body. Apply the included water-based lubricant generously to both the attachment and your entry point. Insert slowly, allowing your body to adjust to the size and angle.

Experiment with different positions, depths, and rhythms to discover what feels best. If using with a partner, communicate clearly about pace and sensation. The suction cup base allows hands-free positioning on smooth surfaces for solo exploration. Explore additional positioning options with Sex Wedges to enhance angles and comfort during extended sessions. Always use water-based lubricant to protect the ULTRASKYN material.

Care and storage

Wash each attachment with warm water and the included toy cleaner immediately after use. Dry completely with a soft cloth and apply refresh powder to maintain the material's texture. Store all three attachments in a cool, dry location away from direct sunlight. Keep the harness clean and dry as well. Never use silicone-based lubricants, as they can degrade ULTRASKYN over time.

Learn more

Understanding how different materials and sizes affect your experience helps you make confident choices about your body and pleasure. Doc Johnson's engineering delivers realistic sensations without compromise on safety or durability. Read Minna Ola Sex Toy Review for deeper insights into how premium materials enhance intimate play.

Mistress Athena's training notes

By Mistress Athena — professional dominant and kink educator, sole instructor behind BDSM Australia's library of training videos. Read her full bio →

This set has become essential in my practice for progressive conditioning and psychological control. The three graduated sizes allow me to challenge my submissives incrementally, building their capacity while maintaining absolute dominance. Color-coding creates anticipation—each hue signals a different intensity level, and my subjects learn to associate each color with specific sensations and expectations. The psychological element is as powerful as the physical one.

What makes this system invaluable is the speed of attachment changes. During a scene, I can shift from one size to another without pause, keeping my submissives in a constant state of uncertainty and focus. They never know which attachment comes next. The dual-density material's realistic texture deepens their surrender, grounding them completely in the moment and my control.

My observations show that the progression through sizes creates measurable psychological shifts in my submissives. Moving from the slim purple to the fuller blue to the more demanding pink teaches obedience and builds trust simultaneously. The set transforms a simple tool into a sophisticated training instrument where physical sensation becomes inseparable from mental discipline and power exchange.

See this and similar tools in action across my 300+ training videos on the BDSM Australia channel.

How it compares

Why you'll reach for it

Add this set to your collection when you want realistic sensation, genuine progression, and the flexibility to adapt to any scenario. At BDSM Australia, you'll find everything needed to explore confidently—the three attachments cover beginner through advanced experiences, the harness system works with other compatible toys, and the complete package arrives with lubricant and cleaner included. Order now and discover how graduated, versatile design transforms intimate exploration. Service That Keeps Customers Coming Back.