GUARANTEE - This knee pain relief patch is fast-acting and will work in several minutes. If not, simply return it within 30 days for a full refund. FAST LASTING PAIN RELIEF - Knee pain relief patch has strong penetrating power, quickly heats up, promote blood circulation, fast-acting and effective pain relief up to 12 hours at a time. EASY TO USE - Wipe the painful skin with warm water before each use, tear off the protective film, and stick the knee patch on the painful area. PAIN RELIEF - These pain patches can relieve various pains such as knee pain, strain and sprain, etc. INGRIEDIENTS - Knee pain patch is is made of a variety of pure natural plant extracts and is made with a scientific self-heating patch design. A total of 48 pieces.