# Fido Advanced Knotted Anal Dildo with Ribbed Shaft Onyx

## What it is

The Fido Advanced Knotted Anal Dildo with Ribbed Shaft Onyx is a Tantus wellness product. Positioned for for-him and for-her. Current price: $60.99 (retail value $67.99). In stock.

## Emma's take

Knotted perfection for the confident explorer.

This isn't your average anal toy. The Fido's signature middle knot creates intense pressure sensations as it moves in and out, while the ribbed upper shaft delivers targeted stimulation to inner muscle bands. At 2.5 inches at its widest point with a substantial 15-ounce weight, this is definitely advanced territory—but for experienced players who know their bodies, it's pure perfection. I love that the silicone is truly premium grade and the base folds down for harness compatibility.

## Specifications

- Insertable Length: 9 inches
- Top Tip Diameter: 1.8"
- Middle Ball Diameter: 2.5"
- Ribbed Shaft Diameter: 1.6"
- Base Diameter: 2.8"
- Weight: 15 oz
- Material: 100% Ultra-Premium Silicone
- Harness Compatible: Yes, with o-ring style harnesses

## What's in the box

- 1x Fido knotted anal dildo
- 1x storage instructions

## Care instructions

- Wash with antibacterial soap and warm water after each use
- Dishwasher safe on top rack, or boil for 3 minutes to sterilize
- Use only water-based or hybrid lubes to protect the silicone
- Store in breathable pouch away from other silicone toys
- Bleach-safe for deep cleaning—dilute 1:10 with water

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

## What makes the knot design special?

The 2.5-inch middle knot creates intense pressure sensations as it moves past your sphincter muscles. It's designed to feel amazing going in and even better coming out, creating a unique popping sensation that standard toys can't match.

## How do I know if I'm ready for this size?

This is definitely advanced. You should be comfortable with toys around 2+ inches in diameter and enjoy fuller sensations. Start with plenty of warm-up and high-quality lube—this isn't a first anal toy.

## Can I use this with a harness?

Yes! The base folds down so you can slide an o-ring around the bottom shaft. It works great with most standard harness systems for partner play.

## How do I clean something this textured?

The ribbing and knot might look complicated, but medical-grade silicone makes cleaning simple. Soap and water gets everything, or toss it in the dishwasher. For deep cleaning, you can even boil it for 3 minutes.

## What lube works best with this toy?

Water-based or hybrid lubes only—silicone lube can damage the toy over time. Given the size and texture, I'd recommend a thicker gel formula that stays put longer than thin lubes.