SONO No. 20 Sleeve with 1.4" Extension Black Soft TPE

What the SONO No. 20 is

The SONO No. 20 is a wearable extension sleeve molded in soft TPE, finished in solid black, with a 1.4-inch extension at the closed tip. The carton front states the product plainly: Sleeve with Extension (1.4"), Soft TPE, model N°20. One sleeve is supplied, ready to use out of the carton, with no batteries, charging, motor or electronics of any kind.

It belongs to the numbered SONO range, where each item carries a plain two-digit reference rather than a marketing name — this one is simply No. 20. If you are browsing the wider category, it sits alongside the rest of our penis extensions and the broader men's toys range, and it is one of the simpler, lower-maintenance designs in that group.

Material and construction

The sleeve is molded from TPE — thermoplastic elastomer — which the carton describes as “soft TPE”. TPE is a family of rubber-like materials that behave like elastic when flexed but can be melted and molded like a plastic. In practical terms that means a sleeve that stretches to accommodate the wearer and then returns to shape, with a noticeably softer, more yielding feel than rigid plastic or dense silicone.

Visually, the body of the sleeve is wrapped in a series of raised horizontal ridges running from the base to just short of the tip, giving it a banded, corrugated profile rather than a smooth surface. The tip is closed and rounded — this is not an open-ended sleeve. At the base, a molded loop extends from the body of the sleeve and forms a separate ring, which is what holds the sleeve in position when worn. The whole piece is a single molding in one color: a flat, non-glossy black with no printing, seams or applied decoration.

TPE is not as non-porous as medical-grade silicone, which matters mainly for how you clean and store the sleeve rather than for how it feels in use. There is more on that in the care notes below.

Every figure above is transcribed from the carton or read directly off the product as photographed. Where the packaging does not state something — overall length, internal diameter, net weight, country of origin — we have left it out rather than estimate it.

How to use it

The sleeve is worn over the wearer, with the molded loop at the base passing around the base of the shaft to hold it in place. Because TPE stretches, it is easier to roll the sleeve on than to push it on dry. Lubricant applied to the inside of the sleeve before fitting makes it go on considerably more easily, and a little more on the outside is worth applying before use.

Fit is the main variable with any one-size molded sleeve. The loop at the base is what stops it from shifting, so take a moment to seat it properly rather than relying on the sleeve body alone. If the fit feels loose, more lubricant usually makes that worse rather than better — check the base loop first.

Cleaning and storage

Wash the sleeve in warm water with a mild, unscented soap before first use and again after every use, turning it inside out if the material allows so the interior gets properly cleaned. Rinse thoroughly, so that no soap residue is left inside, which can cause irritation. Let it air-dry completely before putting it away — a sleeve stored damp is the one that develops a smell.

Store it on its own, not touching other soft toys. TPE and some other elastomers can react with each other on long contact and leave a tacky surface on both. A cloth bag or its own carton is enough. Keep it out of direct sunlight and away from heat.

On lubricant: the carton does not specify a type. Water-based lubricant is the conventional, low-risk choice with TPE, because silicone-based formulas can soften or degrade some elastomers over time. If you want to use anything other than water-based, test it on the base loop first and check the result before committing.

Who it's for

This is a product for adults 18 and over who want a simple, non-powered wearable sleeve rather than a device with settings to learn. The appeal of the No. 20 specifically is that it is uncomplicated: no charging, no controls, nothing to fail. The ridged surface and the 1.4-inch extension are the whole of the design.

It will suit you less well if you want a rigid feel — soft TPE is deliberately yielding — or if you specifically need an open-ended sleeve, since this one has a closed tip. If an adjustable or strapped fit matters to you, a single molded loop may not be enough; our wider penis extensions category has designs with different retention systems.

Good to know

• This is an adult novelty item. It is not a medical device and not a contraceptive — it offers no protection of any kind against pregnancy or sexually transmitted infections.
• For use by adults 18 and over only.
• Stop using it if you notice irritation, numbness, pinching or any discomfort, and speak to a licensed healthcare professional if anything persists.
• Do not use it on broken or irritated skin.
• If you have a known sensitivity to rubber-like or elastomeric materials, check how your skin responds on a small area first.
• Both partners should be comfortable with its use. Communication matters more than the hardware.
• Orders are dispatched in plain outer packaging.

Frequently Asked Questions

What is the SONO No. 20 made of?

It is made of soft TPE — thermoplastic elastomer — which is stated on the front of the carton. TPE is a flexible, rubber-like molding material that stretches and returns to shape. The sleeve is a single molding in solid black, with no fabric, metal or electronic components.

How much does the extension add?

The carton states an extension of 1.4 inches at the closed tip. That figure is printed on the front of the pack as part of the product name — “Sleeve with Extension (1.4")” — and it refers to the molded portion beyond the tip. The packaging does not state the sleeve's overall length or its internal diameter, so we do not list either.

Does it need batteries or charging?

No. The SONO No. 20 is entirely non-powered. There is no motor, no battery compartment, no charging port and no controls — it is a single piece of molded TPE and nothing else, so there is nothing to run out mid-use and nothing to replace.

Which lubricant should I use with it?

Water-based lubricant is the conventional choice for TPE and is what we would suggest. The carton does not specify a lubricant type, but silicone-based formulas can soften some elastomers over repeated contact, so a water-based product is the low-risk option. Apply it inside the sleeve as well as outside — TPE fits far more easily lubricated than dry.

How is the order packaged for delivery?

Orders ship in plain outer packaging with no product images, brand names or descriptive wording visible on the outside. Nothing on the shipping label identifies the contents or the category of goods inside. The item itself travels in its own carton within that outer packaging.

Product information compiled and reviewed by the Gear Isle product team. We transcribe product specifications directly from manufacturer packaging. Found an error? Tell us.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Adult novelty device for adults 18 and over. Consult a licensed healthcare professional before use, especially if you have a medical condition. Keep out of reach of children.