Review (1/5): Terrible product and misleading description
Don't waste your money on this product! First, it is not a flexiknee product as described, but an unknown product from China. The packaging does not say flexiknee anywhere.
Second, the product is painful to use. It burns your skin! There are no ingredients listed on the product so it is impossible to tell what exactly might be causing the irritation.
Terrible product, worst thing I have ever tried from Amazon.