Vac-U-Lock Dual Density Extreme Set Vanilla by Doc Johnson

The Vac-U-Lock Dual Density Extreme Set Vanilla by Doc Johnson is a three-piece strap-on system featuring graduated realistic dildos that warm to body temperature. It combines an adjustable harness, suction cup base, and maintenance kit for couples seeking progressive penetration and lifelike sensation.

The product itself

The Vac-U-Lock Dual Density Extreme Set Vanilla by Doc Johnson delivers three large realistic dildos engineered for experienced play. Each attachment uses dual density ULTRASKYN—a material with a responsive inner core wrapped in soft, skin-like outer layer that mimics genuine sensation and warms as you use it. The firm centre provides structure and depth, while the pliable exterior yields to comfort, creating a tactile experience different from basic silicone toys.

The system works through the Vac-U-Lock connection, which locks each attachment securely into the included adjustable harness or the removable suction cup base. The graduated sizes—10.5, 12, and 15.5 inches—let you progress safely rather than jumping straight to maximum depth. Nothing else in the kit is left to chance: you get water-based lubricant, cleaner, and powder for immediate use and long-term care.

Main features

• Dual Density ULTRASKYN construction: Soft exterior mimics skin texture and warmth while firm inner core provides structure and realistic penetration sensation that intensifies as body heat is absorbed.
• Three graduated sizes: Attachments of 10.5, 12, and 15.5 inches allow you to build comfort and intensity progressively rather than attempting maximum depth immediately.
• Vac-U-Lock system: Universal attachment mechanism creates secure, reliable connection to harness or suction cup, eliminating slippage during use.
• Adjustable harness: O-ring compatible design fits bodies up to 69 inches, ensuring comfort and proper positioning for any wearer.
• Complete care kit included: Water-based lubricant, toy cleaner, and refresh powder mean you have everything needed for safe use and proper maintenance from day one.

The technical detail

• Attachment lengths: 10.5 inches, 12 inches, and 15.5 inches (measured from base to tip); insertable length is approximately 0.5 inches shorter on each
• Diameter: Progressive girth matching each size, starting at 1.5 inches for the smallest and increasing proportionally
• Material: Dual Density ULTRASKYN (hypoallergenic, phthalate-free, temperature-responsive silicone blend)
• Harness dimensions: Adjustable waist 24 to 69 inches; O-ring compatible for universal attachment
• Suction cup base: Removable, flat surface design for hands-free mounting on smooth surfaces
• Weight: Approximately 680 grams total with all three attachments and harness
• Box contents: Three dildos, adjustable harness, suction cup base, 60 ml water-based lubricant, 236 ml toy cleaner, refresh powder, storage pouch

Preparation and first use

Before first use, wash all components in warm soapy water and dry thoroughly. Apply a small amount of the included water-based lubricant to the attachment base and the O-ring on your harness. Insert the attachment into the harness until you hear or feel a secure click, confirming the Vac-U-Lock connection is locked. Adjust the harness straps for a snug fit that allows comfortable movement without sliding. Apply lubricant generously to the dildo and to your partner's body before beginning play.

Start with the smallest attachment (10.5 inches) to accustom your body to the material and size. The ULTRASKYN will begin warming within minutes, improving sensation. Take your time and communicate throughout. After use, separate the attachment by gently pulling away from the harness, then clean all pieces immediately with the included toy cleaner or warm soapy water. Dry completely and apply the refresh powder to keep anal dildos and all attachments in optimal condition. Store in the provided pouch in a cool, dry place.

Who gets on with it

Care and storage

Clean each attachment immediately after use with the included toy cleaner or warm soapy water and a soft cloth. Rinse thoroughly and pat dry with a lint-free towel. Once fully dry, apply a light dusting of the refresh powder to maintain the ULTRASKYN's soft texture and prevent tackiness. Store all pieces in the provided pouch in a cool, dry location away from direct sunlight and extreme temperatures. Keep the harness clean by wiping with a damp cloth and air-drying. Replace caps on cleaner and powder bottles tightly to prevent spilling.

Further reading

Understanding realistic dildo materials and progressive play techniques helps you get the most from this system. Explore how dual density construction differs from single-material toys, and learn about safe size progression for penetrative play. Read more in our guide on The Black Realistic Dildo for in-depth insight into realistic toy selection and care.

What to expect

The ULTRASKYN material takes 5–10 minutes to warm to body temperature, at which point sensation noticeably increases. Most people find the graduated sizes allow genuine progression—the 10.5-inch attachment serves as a comfortable entry point, the 12-inch becomes the go-to size for many, and the 15.5-inch delivers substantial depth for those who have built comfort. The material is softer than you might expect from a firm-core toy, which surprises first-time users pleasantly.

Cleaning is straightforward but requires thoroughness, particularly around the attachment base where lubricant pools. The included cleaner works well, though many prefer plain warm soapy water. Drying completely before storage prevents any odour development. The dual density construction holds up reliably through regular use without degradation, though the soft exterior can show minor surface wear over months of frequent use.

First-time harness users often adjust the fit two or three times before finding comfortable positioning. The adjustable design compensates for different body shapes, but take time to cinch straps properly—loose harnesses slip during vigorous play. The suction cup base works on tile, glass, and sealed surfaces but fails on porous or textured walls; test placement before relying on it for hands-free play.

People who already own standard strap-on kits tend to prefer the realistic warmth and softness of ULTRASKYN once they try it. Those seeking purely firm penetration or maximum girth may find dual density feels too yielding by comparison. The three-size approach suits exploratory couples more than those with fixed depth preferences.

How it compares

Why choose this one

Pick up the Vac-U-Lock Dual Density Extreme Set Vanilla by Doc Johnson when you want realistic sensations, meaningful size progression, and everything you need from day one. The body-responsive ULTRASKYN material and graduated three-piece design set this system apart from basic kits. Order it from Malechastity.com.au with discreet Australia-wide delivery and opens up a complete penetration experience built for experienced couples. Discreet, Tracked Shipping Australia-Wide.