Hyal-Aid - 6 sheets per pack x 4 packs This is a sheet-type hyaluronic acid product that you apply directly to your knees. Each sheet contains approximately 6.6mg of hyaluronic acid. Use once a day before bed. Wear a supporter over it to prevent it from peeling off. The supporter has been used once and has been washed. I purchased a new set of five packs from Rakuten this month (October), and I am selling the four unused packs because I used one. The outer box and the instruction sheet for the supporter have some damage. #HyalAid #HyaluronicAcid #Knee