Short answer: Silexd Model 1 is the range to pick if you want the widest spread of lengths (from 17.5 cm up to the very large sizes) and optional extras such as a remote-control vibrating version or the thermo-reactive Real Skin finish; Model 2 is the one to pick if you want to start smaller (the range begins at 15 cm) with the same platinum silicone over a Silexpan dual-density core. If you want a dual-density dildo with a built-in motor, the Adrien Lastic Hitsens Vibe 3 is the obvious alternative, and if budget matters more than silicone, the Rockarmy and Get Real dual-density ranges give you the same soft-over-firm construction in TPE.
Every product in this guide has a suction-cup base and is described by its maker as harness-compatible, so the real decisions are length, material and whether you want vibration. Prices change, so check the current price on each product page.
What “dual density” actually means
A single-density dildo is the same firmness all the way through. A dual-density dildo has a firmer inner core wrapped in a noticeably softer outer layer. The result is closer to how a body feels: the core gives you shape and control, the outer layer gives.
Silexd and Adrien Lastic call their version Silexpan. In both brands’ catalogue descriptions it is a firm inner core inside a platinum-grade silicone skin. Silicone is non-porous, so it can be washed properly and does not hold on to odors the way softer thermoplastics can. Rockarmy and Get Real achieve the dual-density effect in TPE, which is softer and less expensive, but porous, so it needs more diligent cleaning and drying.
Quick comparison
| Product | Length (catalogue) | Diameter (catalogue) | Material | Vibration | Suction base | Harness-compatible | Notes |
|---|---|---|---|---|---|---|---|
| Silexd Model 1, 17.5 cm | 17.5 cm | not listed | Platinum silicone over Silexpan core | No | Yes | Yes, most harnesses | Also in 20 cm, 23 cm, 26.6 cm and larger |
| Silexd Model 1, 20 cm | 20 cm | not listed | Platinum silicone over Silexpan core | No | Yes | Yes | Mid-size of the range |
| Silexd Model 1, 23 cm | 23 cm | not listed | Platinum silicone over Silexpan core | No | Yes | Yes | Largest of the three verified here |
| Silexd Model 1 Vibrator + remote, 17.5 cm | 17.5 cm | not listed | Platinum silicone over Silexpan core | 10 modes, remote, rechargeable | Yes | Not stated | Motorized Model 1 |
| Silexd Model 1 Real Skin thermo-reactive, 17.8 cm | 17.8 cm | not listed | Thermo-reactive premium silicone | No | Not stated | Not stated | Softens as it warms |
| Silexd Model 2, 15 cm | 15 cm | not listed | Platinum silicone over Silexpan core | No | Yes | Yes, most harnesses | Smallest Silexd in this guide |
| Silexd Model 2, 19 cm | 19 cm | not listed | Platinum silicone over Silexpan core | No | Yes | Yes | |
| Silexd Model 2, 23 cm | 23 cm | not listed | Platinum silicone over Silexpan core | No | Yes | Yes | |
| Adrien Lastic Hitsens Vibe 3 | 18.2 cm | 4 cm | Silexpan silicone over rigid core | 10 modes, USB rechargeable | Yes | Yes | 2-year warranty (catalogue) |
| Adrien Lastic Hitsens 1 | not listed | not listed | Silexpan silicone over rigid core | No | Yes, strong | Yes | Temperature-responsive |
| Rockarmy Dual Density Tiger | 14 cm | 4.46 cm | TPE | No | Yes | Yes | Also sold as a set with harness |
| Rockarmy Dual Density Panzer | 17 cm | 4.46 cm | TPE | No | Yes | Yes | |
| Get Real Dual Density Dildo 17 cm Balls | 17 cm | not listed | TPE | No | Yes | Yes, most harnesses | Sculpted base |
Lengths are total lengths as listed by the supplier; insertable length is shorter once you account for the base. Where the catalogue does not list a diameter we have left the cell honest rather than guessing.
Silexd Model 1
Model 1 is the realistic sculpt: defined glans, surface veining, a slightly curved shaft. The catalogue describes it as a hard inner core with a plush Silexpan outer layer that produces “lifelike weight and flexibility”, and the silicone skin as phthalate-free, latex-free and non-porous. The suction cup base holds on smooth, flat surfaces and fits most strap-on harnesses. Suitable for vaginal and anal use.
- Silexd Model 1, 17.5 cm is the sensible starting size and the one most colour variants are built on.
- Silexd Model 1, 20 cm adds length without changing the sculpt.
- Silexd Model 1, 23 cm is for people who already know they want more; 26.6 cm and larger sizes exist in the range too.
- Silexd Model 1 Vibrator with remote, 17.5 cm keeps the same look and adds a motor with ten modes, a remote and USB charging.
- Silexd Model 1 Real Skin thermo-reactive, 17.8 cm uses a silicone that becomes more supple as it warms and firmer when cool; a brief warm-water soak before use is the trick.
Who it suits: anyone who wants the most realistic look in silicone and may want to go up in size later without changing shape.
Silexd Model 2
Model 2 uses the same platinum silicone over what the catalogue calls a “patented Silexpan dual-density core”, but it is a different sculpt and the range starts smaller. The 15 cm is the smallest silicone dual-density dildo in this guide; 19 cm and 23 cm follow. Suction base, harness compatibility, vaginal or anal use, and the same cleaning routine as Model 1. The catalogue specifically notes that silicone-based lubricants should be avoided with Model 2; the same advice applies to Model 1.
Who it suits: first-time dual-density buyers, harness users who want a shorter dildo for comfortable angles, and anyone who found Model 1’s smallest size a step too far.
Model 1 vs Model 2 in one line
Same material system, different sculpt and different size ladder. Model 2 starts at 15 cm; Model 1 starts at 17.5 cm and runs much larger. If you cannot decide, choose by the length you want; the feel of the Silexpan core is the same.
Adrien Lastic Hitsens
Adrien Lastic’s Hitsens line is the other Silexpan dual-density family in our range, and it is where to look if you want a built-in motor.
- Hitsens Vibe 3: 18.2 cm long, 4 cm in diameter, rigid core in Silexpan silicone, ten vibration modes, USB rechargeable, strong suction base, harness-compatible, and a two-year warranty per the catalogue. It is the only product here where the catalogue gives both length and diameter for a silicone model.
- Hitsens 1: no motor, same construction, with a surface that responds to temperature (warm water for more give, a cool rinse for a firmer feel). Water-based lubricant only.
Who it suits: couples using a harness who want vibration on the receiving side, and anyone who likes the idea of adjusting firmness with water temperature.
Rockarmy and Get Real: dual density in TPE
If silicone is outside your budget, these give you the soft-outer, firm-core feel in TPE.
- Rockarmy Dual Density Tiger, 14 cm, Ø 4.46 cm: the shortest dildo in this guide and the one with the most useful published numbers. Suction base, harness-compatible, waterproof.
- Rockarmy Dual Density Panzer, 17 cm, Ø 4.46 cm: same diameter, more length.
- Rockarmy Harness + Dual Density Tiger set: the Tiger bundled with a harness, which saves working out ring sizes.
- Get Real Dual Density Dildo 17 cm with balls: a sculpted base, suction cup, compatible with most harness systems.
Who it suits: a first dual-density dildo at a lower price point, or a second toy for travel. Be stricter with cleaning and drying: TPE is porous.
Harness compatibility: what to check
All the dildos above have a flared or suction base, which is the one requirement for a harness. Then check the ring. Most harnesses ship with several O-ring sizes; the ring needs to sit snugly below the widest part of the base. If you do not already own one, Adrien Lastic Lastic Strap-On Harness and Get Real Strap-On Harness Black are the two in-stock options that pair with everything in this guide.
Lubricant: the only rule that matters
Use water-based lubricant with every dildo in this guide. Silicone lubricant can soften and damage silicone toys, and oil-based products degrade TPE. Two bottles that work with all of them:
- Pjur Aqua Water-Based Lubricant 100 ml: the plain, unscented default.
- Eros Lube Toy 100 ml: formulated specifically for toy materials including silicone.
If you want the full breakdown of water, silicone and hybrid formulas and bottle sizes, read our lubricant guide.
How to choose: a 60-second checklist
1. Silicone or TPE? Silicone (Silexd, Hitsens) is non-porous and easier to keep hygienic; TPE (Rockarmy, Get Real) costs less and is softer. 2. Length: 14 to 15 cm if you are new or using a harness at awkward angles (Tiger, Model 2 15 cm); 17 to 19 cm as the all-round middle (Model 1 17.5, Panzer, Model 2 19, Hitsens Vibe 3); 20 cm and up only if you already know you want it. 3. Vibration or not? Hitsens Vibe 3 or the Silexd Model 1 Vibrator with remote. 4. Thermo-reactive feel? Silexd Model 1 Real Skin or Hitsens 1. 5. Harness: every product here has a compatible base; pick a harness with multiple ring sizes. 6. Lube: water-based, always. 7. Returns: 14 days unopened; opened intimate products cannot be returned, so settle the size question before you unseal.
Frequently asked questions
Is Silexd Model 1 or Model 2 better for beginners?
Model 2, mainly because the range starts at 15 cm. The feel of the Silexpan core is the same in both.
Do Silexd dildos work in a strap-on harness?
Yes. The catalogue lists the suction-cup base of Model 1 and Model 2 as compatible with most harnesses. Check your ring size against the base.
Can I use silicone lubricant with a silicone dildo?
No. Use water-based lubricant. Silicone-on-silicone can degrade the toy surface, and the Silexd catalogue says so explicitly for Model 2.
How do I clean a dual-density dildo?
Warm water and mild soap or a toy cleaner, rinse, air-dry fully, store separately in a pouch. Silicone tolerates this indefinitely; TPE needs the drying step taken seriously.
Does the suction cup actually hold?
On smooth, non-porous surfaces (tile, glass, a smooth plastic chair) yes. On textured or painted surfaces it will not, regardless of brand.
Which has a published diameter?
Hitsens Vibe 3 (4 cm) and the Rockarmy Tiger and Panzer (4.46 cm). The Silexd catalogue entries give length only.
Does the parcel reveal what I ordered?
No. Delivery is discreet: the sender reads Amorexa and there is no product name on the parcel.
Products in this guide
- Silexd Model 1, 17.5 cm
- Silexd Model 1, 20 cm
- Silexd Model 1, 23 cm
- Silexd Model 1 Vibrator, remote, 17.5 cm
- Silexd Model 1 Real Skin thermo-reactive, 17.8 cm
- Silexd Model 2, 15 cm
- Silexd Model 2, 19 cm
- Silexd Model 2, 23 cm
- Adrien Lastic Hitsens Vibe 3
- Adrien Lastic Hitsens 1
- Rockarmy Dual Density Tiger 14 cm
- Rockarmy Dual Density Panzer 17 cm
- Rockarmy Harness + Dual Density Tiger
- Get Real Dual Density Dildo 17 cm Balls
- Adrien Lastic Lastic Strap-On Harness
- Get Real Strap-On Harness Black
- Pjur Aqua Water-Based Lubricant 100 ml
- Eros Lube Toy 100 ml
Related pages: Shipping · Returns
Sources
- Catalogue text and supplier specifications for Silexd Model 1 and Model 2. The Silexd manufacturer site (silexd.com) could not be retrieved at the time of writing (rate-limited), so material claims are taken from the supplier catalogue only.
- Adrien Lastic official site, https://adrienlastic.com/ (brand confirmed; Hitsens details from catalogue text, IDs 45550, 45543).
- Catalogue text for Rockarmy Dual Density Tiger and Panzer and Get Real Dual Density 17 cm.
- Amorexa shipping and returns pages.
