Hyal-Aid, 6 sheets per bag x 4 bags. 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 bags from Rakuten this month (October), and I am selling the four unused bags because I used one. The outer box and the instruction sheet for the supporter have some damage. #Hyal-Aid #HyaluronicAcid #Knee