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Quantity
1
Description
4.6
74 ratings
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1
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
Effective devices
Easy to wear. Versatile, effective, small enough to pack in my suitcase when on the road - I am 52 and a runner - these are life changing
Emma · 9 days ago
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





