Vac-U-Lock Dual Density Ultraskyn Colors Set

The Vac-U-Lock Dual Density Ultraskyn Colors Set is a three-piece strap-on system with interchangeable attachments that snap into an adjustable harness. Each attachment features dual density Ultraskyn material—soft outer layer, firm core—that warms to body temperature. It's built for couples exploring pegging or anyone wanting realistic variety without buying separate pieces.

What you're getting

The Vac-U-Lock Dual Density Ultraskyn Colors Set from Doc Johnson is a complete strap-on system that swaps traditional single-piece designs for true flexibility. Three interchangeable attachments lock into a harness using the Vac-U-Lock mechanism—a suction-style snap that holds firm and releases in seconds. Unlike basic cock rings, which sit passively, this harness is worn and actively used during penetrative play.

The dual density Ultraskyn material sets it apart from cheaper silicone alternatives. The outer layer is soft and skin-like; the inner core stays firm, creating a realistic feel that warms naturally against the body. You get variety without buying three separate toys—pink realistic, blue standard, or purple slim—each engineered to deliver different sensations. Everything needed to maintain and use the system arrives in the box.

Key features

• Quick-change attachments: Three different sizes and shapes lock in via Vac-U-Lock mechanism, swapping takes seconds.
• Dual density construction: Soft outer layer mimics skin texture while firm core provides structure and realistic penetration sensation.
• Adjustable harness: Waistband expands up to 69 inches, stays secure during use, compatible with O-ring accessories.
• Body-safe materials: Ultraskyn is phthalate-free and talc-free, warming to natural body temperature during wear.
• Complete care kit: Water-based lubricant, toy cleaner, and refresh powder included for immediate use and proper maintenance.

Specs in full

• Attachments: 8-inch pink realistic dong, 7-inch blue cock, 7-inch purple slim cock, all dual density Ultraskyn.
• Harness: Adjustable nylon and elastic blend, waist circumference up to 69 inches, O-ring compatible at base.
• Attachment system: Vac-U-Lock suction-lock mechanism, secure hold, tool-free release.
• Material specifications: Phthalate-free, talc-free, hypoallergenic, body-safe silicone blend.
• Weight: Lightweight harness with medium-weight attachments for comfortable extended wear.
• Included accessories: Water-based lubricant, antibacterial toy cleaner, silicone refresh powder.

How to fit and wear a cock ring

Start by adjusting the harness to your waist size before use. Step through the leg openings and fasten the closure at the back. The fit should be snug but not cutting off circulation—you should fit one finger comfortably between the harness and your skin. Once fitted, select your attachment and align the Vac-U-Lock connector with the base ring, then press down firmly until you hear or feel it lock into place. The attachment should not twist or shift when you tug it gently.

Apply water-based lubricant generously to the attachment before use. During penetration, let the weight of the attachment do much of the work rather than thrusting hard immediately—this reduces strain on the harness and attachment base. After use, remove the attachment by pressing the release button or tab on the Vac-U-Lock base and lifting away. Unlike fixed strap-ons, this system lets you swap attachments mid-session or adjust fit without taking the whole harness off. Stretchy cock rings offer a different approach to comfort if you prefer simpler, more minimal wear.

Is it right for you?

Care and storage

Wash each attachment and the harness base with warm soapy water or the included toy cleaner after every use. Dry thoroughly with a soft cloth before storage. Apply the refresh powder lightly to Ultraskyn attachments to restore silkiness and prevent tackiness over time. Store the harness and attachments in a cool, dry place away from direct sunlight and extreme heat. Keep away from other silicone toys, as materials can interact. The Vac-U-Lock connectors require no special maintenance beyond a quick rinse.

Where to read more

Our guide on strap-on selection covers fit, material choice, and what beginners should expect. For an in-depth review of cock ring technology and dual density material behaviour, read the Mixjoy Cock Ring Review. Both resources explore how realistic materials perform during extended wear and why attachment security matters.

What to expect

First-timers often underestimate how realistic the dual density feel is until they touch one. The outer softness combined with inner firmness does genuinely mimic natural sensation in a way smooth silicone cannot. Many people find the harness sits lower and more comfortably than expected, with the weight of the attachment distributed across the thigh rather than pinching at the base.

The Vac-U-Lock mechanism works smoothly when kept clean, but mineral deposits from water or dried lubricant can reduce the seal. Rinsing the connector after use and drying it prevents this entirely. Most users report the harness stays secure even during vigorous motion once fitted properly—poor fit is the main reason for slipping rather than a system flaw.

Cleanup is straightforward because the attachments detach from the harness, letting you wash both separately. Ultraskyn does stain if exposed to certain dyes or dark colours over long storage, so keeping attachments in separate pouches prevents this. The refresh powder is not optional—applying it monthly restores the soft feel and prevents the material from becoming sticky.

Users who return this set usually cite discomfort from improper harness sizing or underestimation of the care routine. Those who get sizing right and maintain the attachments report it lasts for years with consistent performance. The three-attachment variety keeps things fresh, meaning you reach for it regularly rather than it becoming a novelty.

How it compares

Why you'll reach for it

Find the Vac-U-Lock Dual Density Ultraskyn Colors Set when you want a strap-on system that feels real, adapts to your mood, and arrives complete. Three attachments mean you choose size based on sensation and comfort each time, not settling for one permanent option. The dual density material does what cheaper silicone cannot—warming naturally and delivering skin-like texture that changes how the experience feels. Order it from Malechastity.com.au with discreet Australia-wide delivery and start exploring variety without buying three separate pieces. An Established Australian Adult Retailer.