The Light-Ease Leg Wrap offers 110 continuous and pulsed LED diodes perfect for lighting around legs & suspensory ligaments. All Light-Ease photobiomodulation pads use LEDs that each offer a combination of 660nm Red (1) and 850nm Near-Infrared (2) output. Over 5 decades of scientific research has shown that using a combination of red & near-infrared light offers pain relief and tissue regeneration benefits greater when used together then each wavelength alone. 660 nm Red Light - can be seen by the human eye and triggers a chemical response in living tissue. 850 nm Near-Infrared light is not visible to the human eye and triggers a physical response in living tissue. Leg Wraps have a specific LEFT vs RIGHT orientation. Please indicate the wrap for the correct leg (orientation) or purchase a (L/R) pair for greater savings.