Frequently Asked Questions

How does Firefly work?
Firefly’s OnPulse™ technology uses small electrical pulses to stimulate the peroneal nerve (a nerve in your leg). This increases full-body blood flow. That means more fresh blood and oxygen to reduce lactic acid and soreness, eliminate toxins, and keep muscles flexible.
Recommended usage will optimize recovery so you can train harder and perform better. Firefly Recovery is used for warm up (30-60 minutes) post workout recovery (1-4 hours) and travel (duration of travel).
No, it is not recommended to use Firefly during training or a workout. However, as Firefly is a portable device, it can be used when walking, stretching or on-the-go.
Absolutely. Since Firefly increases blood flow throughout your entire body, it always functions as a full-body recovery device.

Firefly Starter Packs have everything you need to get the full Firefly experience – they also comes at a discounted price.

Starter Packs include Firefly devices, and two accessory straps.

If you’re new to Firefly, we reccomend getting a Starter Pack, which has Firefly devices and accessory straps. This gives you enough time to get the full recovery experience.

If you’re restocking, you can save money by buying in bulk or getting a subscription.

We reccomend getting the Accessory Straps (included in the Starter Packs).

The Accessory Strap keeps Firefly securely in place whether you are resting or in motion. Additionally, as the gel-based backing on Firefly devices may become less adhesive after multiple uses, the accessory strap will help to ensure proper stimulation from the device.

Recommended usage will optimize recovery so you can train harder and perform better.

Firefly Recovery is used for warm up (30-60 minutes), post workout recovery (2-4 hours), and travel (duration of travel).

Simply apply Firefly to the correct location on your peroneal nerve and turn the device on.

For full instructions click here.

When used as recommended, the Firefly device has a 30 hour battery life. The number of uses will depend on the length of each recovery session (average session is 1-4 hours). Afterwards, the battery is not rechargeable, it can be removed and recycled like any household battery.

The Firefly device should not be painful. You will feel muscles in the lower leg contract every second, which causes your foot to twitch (Firefly flutter). It may take a few moments to adjust to the sensation, but the movement is critical to increasing blood flow and recovery. if the sensation is too strong, decrease the level.

The Firefly is a modified NMES that stimulates a nerve vs. a muscle, it is not a muscle stim or TENS unit. Stimulating the peroneal nerve causes muscles to contract and to increase blood flow. Stimulating a muscle (with traditional NMES) for extended periods of time can cause muscle fatigue. The Firefly safely avoids muscle fatigue that can be caused by TENS. Click here for a modality comparison.
Individuals with pacemakers and recently diagnosed DVT should not use the Firefly. See the instructions that accompany the device for a full list of contraindications, warnings and precautions. Please see our technical specifications.

Many Firefly users find it easier to apply the Firefly to a bent leg as it is easier to locate the fibular head. You need to see a slight foot “flutter” for Firefly to work fully. The setting might need to be adjusted when you bend or straighten your leg. Increase or decrease the setting as needed when changing positions.

Yes, you can wear compression socks with Firefly, but research suggests it may not provide extra recovery benefits. A study (Ferguson et al., European Journal of Applied Physiology, 2014) found that neuromuscular electrical stimulation (NMES), like Firefly, significantly reduces muscle soreness—more effectively than compression socks alone. However, combining the two didn’t show any added benefit.

Firefly Recovery products are manufactured in the UK using carefully sourced, high-quality components, including parts made in the U.S.