# Shaft Model F Vibrating Penis Extender Sheath Size 2 Mahogany

## What it is

The Shaft Model F Vibrating Penis Extender Sheath Size 2 Mahogany is a Shaft wellness product. Positioned for for-him and for-her. Current price: $94.99 (retail value $109.99). In stock.

## Emma's take

Real-feel silicone, eight vibrating modes, one shared orgasm.

The Shaft Model F is built for partners who want more from every stroke: more length, more fullness, and a rumbling vibration that carries through both of you at once. FLEXSKIN liquid silicone gives the exterior a lifelike warmth and flex that reviewers consistently single out, and eight vibration modes plus a boost function mean you control exactly how much intensity arrives and when. The wireless remote keeps both hands where they belong.It suits couples who want a genuine dual-sensation upgrade and rewards a little extra lube and communication on the first session.

## Specifications

- Total length: 8.8 inches
- Insertable length: 6.9 inches
- Internal length: 4.9 inches
- Internal diameter: 1.6 inches
- Internal insert length: 0.8 inches
- Vibration modes: 8
- Material: FLEXSKIN real-feel liquid silicone
- Waterproof: 100% waterproof, wireless remote included

## What's in the box

- 1x Shaft Model F vibrating extender sheath
- 1x wireless remote
- 1x USB charging cable

## Care instructions

- Rinse with warm water and mild toy cleaner after every use.
- Pat dry thoroughly before storing; silicone retains moisture in seams.
- Store away from other silicone toys to prevent material transfer.
- Use water-based lube only to protect the FLEXSKIN silicone surface.
- Remove the wireless remote battery if storing for extended periods.

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Last updated: 2026-08-15
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## Frequently asked questions

## What does FLEXSKIN silicone actually feel like against skin?

FLEXSKIN is Shaft's proprietary liquid silicone formula, engineered to mimic the warmth and give of skin rather than reading as firm rubber. Reviewers describe it as noticeably softer and more lifelike than standard TPE sleeves.

## Does the wearer need a full erection for the Model F to work?

The Model F is a supportive sleeve designed to extend natural function, so the wearer needs an existing erection to use it effectively. The 1.6-inch internal diameter and 4.9-inch internal length accommodate most wearers comfortably at that stage.

## How do the eight vibration modes work with the wireless remote?

The remote cycles through eight patterns, including steady and pulsing modes, plus a boost function for a temporary intensity surge. Range and response are typical for Bluetooth-free RF remotes: reliable across the bed, less so through walls.

## Can I use silicone-based lube with the FLEXSKIN sleeve?

No. Silicone-based lubricants can degrade liquid silicone surfaces over time and dull the lifelike texture. Water-based lube is the right choice here, applied generously both inside the sleeve and at the exterior for the receiving partner.

## How do I clean the extender after use?

Rinse the sleeve inside and out with warm water and a toy-safe cleaner immediately after use. Pat dry rather than rubbing, and let it air-finish before storing. The fully waterproof rating means it handles thorough rinsing without hesitation.

## Is this a good first extender for couples trying one together?

It works well for couples who are curious but want the extra reassurance of a realistic feel and remote-controlled vibration to share the experience. The size 2 sheath sits in a moderate range, so starting slowly with plenty of lube and open communication makes the first session comfortable for both partners.