# FIDO Pup-Knot Cocksheath with Ballsling 9.25 Inch

## What it is

The FIDO Pup-Knot Cocksheath with Ballsling 9.25 Inch is a Oxballs wellness product. Positioned for for-him and for-her. Current price: $85.99 (retail value $86.00). In stock.

## Emma's take

The pup-play extender with that signature Oxballs stretch.

This is Oxballs doing what they do best: taking an extender and making it unforgettable. The mid-shaft knot gives both partners something to feel, while the attached ballsling keeps everything locked in place no matter how vigorous things get. I love that the inner nub is removable—customize the fit without compromising the fantasy. The FLEX-TPR has that signature Oxballs stretch that grips without pinching, even during extended scenes. Fair warning: this is boldly designed kink gear that doesn't pretend to be anything else.

## Specifications

- Total length: 9.25 inches
- Inner core: 7 inches
- Insertable length: 8 inches
- Diameter: 2.25 inches
- Material: FLEX-TPR by Oxballs
- Features: Mid-shaft knot, attached ballsling, removable nub insert
- Compatible lubricant: Water-based only

## What's in the box

- 1x FIDO Pup-Knot cocksheath with attached ballsling
- 1x removable nub insert for length adjustment

## Care instructions

- Wash with antibacterial soap and warm water before and after each use
- Compatible with water-based lubricant only—avoid silicone lubes
- Remove nub insert for thorough cleaning of hollow chamber
- Squeeze out air bubbles from base to tip for secure fit
- Store in cool, dry place away from other TPR toys

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Last updated: 2026-07-21
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## Frequently asked questions

## How does the ballsling attachment work for security?

The attached sling stretches around your balls to anchor the entire sheath in place. This dual-point contact prevents slipping even during vigorous play, giving you confidence to focus on the scene.

## What's the purpose of the removable nub insert?

The nub insert shortens the internal chamber by about an inch, letting you customize the fit. Remove it for full 7-inch internal length, or leave it in for a more secure grip on shorter anatomy.

## How do I prevent air bubbles for the best fit?

Before putting it on, squeeze firmly from the tip down to the base to expel trapped air. This creates a better vacuum seal and more secure wear throughout your session.

## Is this suitable for beginners to extenders?

This is advanced gear designed for experienced users comfortable with kink play. The substantial size, mid-shaft knot, and ballsling design assume familiarity with extenders and pup play dynamics.

## How should I clean the hollow interior?

Remove the nub insert first, then flush the hollow chamber with antibacterial soap and warm water. Use a soft brush if needed to reach all interior surfaces, then air dry completely.