Sew-In Pac

The WMB Sew-In Pac is designed to be used in performance situations without the allowance for an elastic belt.  The Sew-In Pac has 1.5” of strong, lightweight athletic knit material on all sides of the wireless unit and comes ready to be machine or hand sewn into any garment.

Made with fabric covered Dri-Prene, a high-performance TPE foam, the Sew-In Pac is durable, moisture-resistant, latex-free, machine washable, and quick drying.  Hook & loop closures secure the antenna and mic connectors in place while protecting wireless equipment from moisture.

The Sew-In Pac can be sewn securely into any garment, washed in place, and removed for reuse.  The white Sew-In Pac can be dyed to match many custom garment colors

Frequently Asked Questions

The Sew-In Pac is a wireless transmitter pouch designed to be sewn directly into a costume or garment, rather than attached to a separate belt. It is the right choice for productions where a visible external belt is not acceptable, such as tight-fitting costumes, period pieces, dance shows, or any situation where the transmitter needs to be fully integrated into the wardrobe. The Belt Pac, by contrast, sits on a removable belt and is easier to access and remove or transfer between performers. If concealment and garment integration are the priority, the Sew-In Pac is the better fit.

The Sew-In Pac has 1.5 inches of strong, lightweight Powermesh fabric on all sides of the transmitter pocket. This fabric border is what gets sewn, by machine or by hand, into the garment. The Sew-In Pac v2 is designed to be sewn through the seams on both sides of the pac, which leaves the top and bottom open to hide or pass cables behind the pouch. Both Sew-In Pac models are designed to sit flush and low-profile once sewn in, making the transmitter secure without adding visible bulk to the garment.

Because the Sew-In Pac can be placed anywhere in a garment, the comfort of the wearer will usually define the best location for the wireless equipment. To best support the wireless reception, the placement should also make an effort to allow the antenna to remain straight and not get tangled in any other fabric layers or cables. Placing the Sew-In Pac with the opening facing down will allow gravity to help the antenna stay straight and reduces the chance for moisture to travel directly down the cables into the wireless connectors.

Yes, and that is one of its core design features. The Sew-In Pac can be washed in place while sewn into the garment. It’s recommended to wash the garment on a gentle cycle in cold water with mild detergent, and always air dry. Do not put it in a dryer, as the Dri-Prene foam can shrink after repeated dryer cycles, which may affect how well the transmitter fits inside the pocket.

Yes. The Sew-In Pac is designed to be removed from a garment at the end of a production and reused in another. The fabric panels can be carefully cut out or un-sewn from the garment without damaging the pac itself. This makes it practical for rental houses, repertory theatres, and touring productions that need to repurpose transmitter pacs across multiple shows.

Both models of the Sew-In Pac are designed to be slim, moisture-resistant cases that will securely enclose the wireless unit. The 2 main differences between the models are how the pac is sewn into a garment and the type of velcro used on the opening. The Sew-In Pac v1 has Powermesh fabric surrounding the pac and can be sewn around all 4 sides of the wireless unit. This security allows wireless equipment of all sizes to be solidly attached to any costume or garment. The Sew-In v2 is designed to be sewn through the seams on 2 sides of the equipment and leaves a channel behind the pac that can allow any cables to be stored or pass behind the wireless. The Sew-In v1 has standard hook and loop closures at the opening and the Sew-In Pac v2 has low-profile hook and loop closures that are less likely to catch athletic jerseys or snag on other delicate fabrics.

Sew-In Pacs are available in black, white, and tan. The white version can also be dyed to match custom garment colors, which is useful for productions with unusual or vibrant costumes where a standard color would not blend in.

WMB makes a dedicated Sew-In Pac to match each transmitter, custom-fit to its exact dimensions. Each product listing also notes compatible transmitters for other manufacturers or models that will fit the same size Sew-In Pac. To find the right model, search or match your transmitter's brand and model number to the corresponding filters on the Sew-In Pac collection page. If your transmitter is not listed, WMB's contact page offers troubleshooting assistance to find the right fit for your equipment.

Yes. The Sew-In Pac is made from latex-free Dri-Prene TPE foam. There is no latex in the foam, the fabric covering, or the hook-and-loop closures, which is important for productions where the pac is sewn directly into a costume worn against the performer's skin for extended periods.

Once sewn into a garment, the pac holds the transmitter through a combination of the custom-fit pocket, which is sized specifically for each transmitter model, and hook-and-loop closures that secure the antenna and mic connector ports. Because the pac is integrated into the costume itself, it moves with the performer rather than shifting independently, making it well-suited for dance, high-movement theatre, and other shows where a belt-mounted transmitter might bounce or rotate out of position.

The Sew-In Pac is made with a thinner 1mm Dri-Prene TPE foam that reduces the thickness and weight by 30% over the Belt Pac. The Sew-In Pac profile will roughly match the footprint of the transmitter itself, with the custom-fit case allowing the edges to taper down around the edges, instead of outlining the edge of the equipment.. For very form-fitting costumes, wardrobe teams often position the pac at the small of the back, along the side torso, or on the inner thigh.

Yes. The Sew-In Pac is designed to be moisture-resistant. When the hook-and-loop closures are sealed around the antenna port and mic connector, it significantly reduces direct exposure at the most common failure points when transmitters are worn against skin without protection. For the most moisture protection possible, make sure sweat doesn’t directly run down lav cable into the transmitter by orienting the Sew-In Pac with the opening toward the bottom or by using a Cable Disc to redirect the moisture from the cables.