Ultra Si Prostate Massager Waterproof by Nexus

The Ultra Si Prostate Massager Waterproof by Nexus is a vibrating prostate toy made from a polypropylene core wrapped in silicone, designed for hands-free or partnered stimulation of the prostate gland. It combines precise internal pressure with multiple vibration modes to build sensation at your own pace.

What it is and how it's made

The Ultra Si Prostate Massager Waterproof by Nexus combines two materials to deliver both precision and comfort. A firm polypropylene core transfers vibrations directly where they matter most, while the outer silicone layer feels soft and natural against your skin. The ergonomic shape is angled to target the prostate gland internally, making it fundamentally different from external stimulation. Unlike basic prostate toys that rely on shape alone, this one adds programmable vibration, giving you control over intensity and rhythm.

The build prioritises both sensation and longevity. The polypropylene core resists material fatigue from repeated flexing, while the silicone exterior remains smooth and non-porous. USB charging means no batteries to replace, and the waterproof casing allows use in any environment without worry about water damage.

What it does well

• Targeted stimulation. The angle and shape place vibrations directly against the prostate, delivering sensation that external-only toys cannot match.
• Vibration range. Multiple modes let you start gently and build intensity, or stay at your preferred level—you control the experience, not a fixed setting.
• Hands-free wear. Once positioned, it stays in place during solo sessions or partnered activity, freeing you to focus on sensation.
• Material pairing. The polypropylene core flexes without wearing out, while the silicone exterior feels skin-like and remains easy to clean between uses.
• Waterproof reliability. Full submersion capability means it functions equally well in the shower, bath, or on dry surfaces without any loss of waterproofing.

Full specifications

• Outer material: Medical-grade silicone, body-safe and non-porous.
• Inner core: Polypropylene for structural integrity and vibration transfer.
• Waterproof rating: Fully submersible; safe for all water-based environments.
• Power source: USB rechargeable lithium-ion battery; no batteries required.
• Vibration modes: Seven distinct patterns from gentle pulse to powerful rhythm.
• Controls: Three-button interface for mode selection and on/off.
• Box contents: Massager, USB charging cable, storage pouch, instruction booklet.

Warm-up, use and removal

Before insertion, warm up the area gently and relax your pelvic floor muscles—tension will make entry uncomfortable. Apply plenty of water-based lubricant to both the toy and your opening; this toy works best with generous lubrication. Insert slowly at an angle pointing towards your front wall, where the prostate sits. Once positioned, start with the lowest vibration mode and let your body adjust for a minute before increasing intensity.

During use, many people find that gentle rocking or subtle repositioning heightens sensation. Removal should be slow and calm—never rush. If you feel discomfort at any point, lower the vibration level or stop and rest. Some users prefer to use P-Spot Dildos for initial exploration before moving to vibration, so start conservatively if this is your first prostate toy. After each session, wash thoroughly with warm water and mild soap, dry completely, and store in the provided pouch.

Is this the one for you?

Care and storage

Wash the massager after each use with warm water and mild soap, paying attention to all crevices. Dry completely before charging or storing. The USB charging port should stay dry—wipe the connection point before plugging in. Store in the included pouch in a cool, dry place away from direct sunlight. Avoid extreme temperatures, which can degrade the battery. Do not use silicone-based lubricant, as it breaks down the outer silicone layer over time.

Want to know more?

Understanding how prostate stimulation works and what to expect will help you get more from your toy. Read our detailed guide on Funtoys Gpop Prostate Pleasure for expert insight into sensation, positioning, and technique. Many first-time users find that knowledge and patience make a real difference in how much they enjoy the experience.

What to expect

The first time you use this toy, allow extra time for warm-up and adjustment. Most people need at least a few minutes of gentle vibration before the prostate responds with stronger sensation. The polypropylene core stays firm, so you'll feel structural support rather than softness—this precision is intentional and delivers more focused stimulation than silicone-only toys. Some users experience a learning curve of two to three sessions before finding their preferred angle and vibration mode.

The silicone exterior feels natural on skin, but does not stretch significantly. Fit matters: if you find insertion difficult even with lubricant, this toy may not suit your anatomy. Conversely, if insertion feels loose, the vibration will still transmit effectively because the core is rigid. The seven vibration modes offer genuine variation—some users prefer steady high intensity, while others enjoy the building pulse patterns that mimic natural rhythm.

Battery life is typically three to five hours per charge depending on which mode you use most. The USB cable charges it fully in about ninety minutes. Water resistance holds indefinitely with normal use, though repeated hot-water washing does not damage the materials. Most users report that the toy remains quiet enough not to be heard through a closed door, though not silent.

Common returns happen when people underestimate the learning curve or expect sensation too intense too quickly. Taking time to explore lower vibration modes, using plenty of lubricant, and understanding that the prostate responds gradually leads to satisfaction. Those who stick with it past the first three uses typically keep the toy long-term.

How it compares

The final word

Explore the Ultra Si Prostate Massager Waterproof by Nexus if you want internal stimulation with the freedom to control vibration intensity and rhythm. Order it from Malechastity.com.au with discreet Australia-wide delivery. The dual-material design and waterproof build make it a serious choice for anyone committed to exploring prostate sensation beyond entry-level toys. Add it to your collection today. Service That Keeps Customers Coming Back.