Sinnovator Knot Sheath Platinum Silicone Open Tip Penis Extender

Sinnovator Knot Sheath Platinum Silicone Open Tip Penis Extender 3 4.7 5 1
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In stock
Key Features
  1. Extremely loyal companion clings to its owner & follows their lead wherever they may go!
  2. Designed with an internally ribbed texture & an open tip to ensure unparalleled stimulation for the wearer
  3. Fine quality penis sheath showcases exquisite design detail, including a pointed tip at the opening, bulbous knot, raised veins & fur texture near the base
  4. Expertly designed with a ball loop to keep the sheath in place that is painstakingly crafted to look like a luxurious leather collar with gorgeous needlework & a buckle fastening
  5. Hand poured from premium platinum silicone – 100% body safe, non-toxic, phthalates free & compatible with all lubricants
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Always by its owner’s side when they need them most, this affectionate animal loves to be in the presence of others and will do everything it can to ensure they enjoy its company! A loyal companion, it has expertly evolved from its predecessor, the Knot, into a unique crossbreed with all the very best features of each party involved in its conception. Expertly trained by its owner, it follows commands without question and is happy to remain on a tight leash, thoroughly exploring areas close by and venturing only into the areas instructed.

Like all Sinnovator toys, the Open Knot Sheath is expertly hand poured using premium platinum silicone, meaning it not only feels incredible, it is 100% body safe, non-porous, phthalates free and compatible with all your favourite lubricants. Showcasing all the same exquisite design detail as the Knot, including raised veins, fur detail and a large knot near the base, this stunning sheath adds unique texture and girth to the wearer’s penis, which promises unparalleled stimulation for their partner. In addition, it has also been painstakingly designed to ensure unparalleled stimulation for the wearer with its open tip, internally ribbed texture and the point at the opening which applies delectable pressure to the coronal ridge. The open end not only allows the wearer to experience every single sensation, but it also enables them to cum whilst wearing.

Measuring 7.87 inches in circumference around the knot, this cock sheath is only for those that are very well trained. The ball loop at the base keeps the sheath in place for the duration of your play, whilst also restricting blood flow our of the penis, for a stronger, longer lasting erection. Boasting unparalleled attention to detail, this ball loop is even designed to look just like a luxurious leather collar!

Signature Colour: The Sinnovator Open Knot Sheath showcases a stunning bronzed rose gold and deep woody burgundy to really draw out the dimensions and realistic features. The rippling colours of the silicone wraps the product in flecks, and streams of darker accents draw out the beauty and elegance whilst also enhancing the shape and contours. Choose ‘signature colour’ above to add this masterpiece to your collection.

Sinnovator Open Knot Sheath

Delivery & Returns

  • Free UK delivery when you spend over £60
  • Next day delivery available if ordered before 3:45pm weekdays
  • International delivery from £8.99
Discreet Packaging

Your privacy is of the utmost importance to us and with our discreet packaging you can shop in confidence. With totally plain packaging, the only person getting excited by your delivery is you.


You can return any unopened and unused product with its packaging or tags intact to us within 30 days of receiving it. If you're item is incorrect or damaged, you will receive a FULL refund; however, if you have simply changed your mind a small £2 fee will be deducted for postage.

Sinnovator - How It's Made

Step 1: Mix

Step 1. Mix. Crafted just for you, your Sinnovator creation requires a specialised mix of oils and powders to ensure the correct colour and firmness. The ingredients must be accurately measured, stirred, and placed in a vacuum chamber to eliminate gas and bubbles prior to pouring.

Step 2: Pour

Step 2. Pour. Handcrafted clay sculptures form a structure for the moulds into which the specialised silicone mix is poured. Every customised creation is painstakingly hand poured by skilled artisans, who create a steady stream of silicone that gradually fills the mould and creates a luxurious marble effect.

Step 3: Pack

Step 3. Pack. Once the silicone has set, your tailor-made Sinnovator creation is expertly removed from its mould and beautifully packaged in a resealable, clear fronted bag. Passionate about their work and adding that extra personal touch, our craftsmen will then use a label to sign and date your artwork.

Step 4: Deliver

Step 4. Deliver. Simply place your order before 12pm and your item will be despatched within 48 hours. 100% discreet, there are no company details or indications as to what is inside your parcel and the strong, protective packaging ensures your Sinnovator sex toy reaches you in the very finest condition.

Made in the UK

Your Sinnovator toy is created in our workshop in the UK and is made of materials that are all 100% produced in the USA. We only use platinum silicone, which is a premium quality, body safe material instead of the old favourite, vastly inferior rubbers, vinyls and plastics.


Have questions? Check out our in depth explainations on the product, delivery and returns.

Learn more