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Quantity
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4.6
73 ratings
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Mixed Injury + Standard Recovery Use
I sprained my ankle (high grade 1/low grade 2) (pt student diagnosed) and had been thinking about these for standard recovery, but thought I would take a shot and see if it helped with the sprain as well. It took a little longer that I would have like to get there, but I should have gotten expedited shipping in hindsight. Anyway, started about a week after the sprain, and it felt like magic; it hurt to walk and stand, but 2 hours of these puppies and the pain got significantly better. The benefit seemed to fade within a few hours, but for those few hours, it made it much more bearable. It felt like a 2 steps forward 1 step back kinda process, but I do believe that it has accelerated my healing. I used it every day for the first two weeks, and now I just use it after leg based activity; bike, stair stepper, elliptical, and while those are low stress and chosen to minimize aggravating the sprain, they still caused a bit of additional discomfort, but there seemed to be a noticeable reduction in discomfort after using the firefly. As I return to normal, and start pushing activities harder, I have also noticed a distinct reduction in fatigue the following day, just as they promoted. Overall, I am incredibly pleased with the impact these have had on my recovery, but I don't know if I will be able to shell out $50 regularly to use them for standard recovery after these run out. I may purchase again to use just after longer more intensive workouts or ahead of a race, but if they were able to make it a replaceable band with a plug and play battery unit, (cheaper and less waste) I would 100% make this a a regular part of my recovery routine.
James · May 11, 2026
Love these!
I wore these on my recent flights to and from London. My legs felt surprisingly good upon landing, both times. Even leading up to London, I wore them to help speed up recovery for a leg injury and I really think they helped. I would definitely purchase them again.
Allison · April 17, 2026
So far so good
I use this after walking rounds of golf and playing racket sports. I do feel like I’m less sore and stiff the next day but hard to tell for sure. I’m looking forward to trying on some long flights. Only ding is that they are not rechargeable.
Gordon · March 26, 2026





