The Highest Copper Content. Copper Compression products have the highest copper content. Rather than spraying fabrics with copper, we infuse it directly into the nylon fibers. Our products are constructed with 85% copper-infused nylon. This innovative approach brings you maximum hygienic benefits, enhanced protection and a superior experience. Copper Compression products utilize genuine copper ions (Cu+ and Cu++) rather than copper oxide (Cu2O). This is an important distinction because it means that we not only have the highest copper content... we also utilize the HIGHEST QUALITY copper. We believe that if you are buying copper-infused products that you should get actual top grade copper at the highest copper content available. Copper Compression’s Night Sock is a soft boot that gently draws your foot forward, providing a continuous stretch along your plantar fascia, achilles tendon, and calf muscles. This orthopedic support securely immobilizes your foot while you’re asleep, ensuring that your foot does not rest at a poor angle. This novel brace design comes with an adjustable strap, letting you choose the position and angle of your foot while you sleep. Enjoy uninterrupted sleep and never wake up to sores, cramps, and aches when your muscles stay stretched and engaged all night long. Quick and easy adjustability with tension strap. Night sock provides a snug fit around your foot, ensuring it will not slip off overnight. Anti-rub fabric reduces itching and discomfort. Can be worn directly on skin or over a sock. Can be worn on either the left and right foot. It's no secret that as you age you feel more stiff and sore and it takes longer for your muscles to recover. Simple things like walking and going up stairs can even be challenging to some people as they age... especially people suffering from arthritis, inflammation, or injury. But giving up, doing nothing, and sitting on the couch is NOT the answer. Copper Compression can help you feel good enough to stay active and healthy! 85% copper-infused nylon (#1 highest copper content). Compression + stability support your body during all activities. 4-Way stretch construction enhances your movements while providing the flexibility to flow freely. Moisture wicking materials that dry fast, keeping you cool and comfortable. Copper-Infused fiber technology. We back all of our products with a money-back promise. If you are not completely satisfied with this product for any reason, we will gladly issue you a prompt refund. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.