By promoting blood circulation, it helps in soothing and improving stiffness, discomfort, sub-chronic and chronic pain of your knees Relieving soreness over your knee Enhancing passive warm up or injury recovery Chic design ensures a comfortable fit and excellent compression support to your knees, without interfering any daily activities with the stretchable and breathable material. control / smartphone app: five heat-setting levels & maintain constant temperature 15/30/60-minute timer. (*smartphone app can connect up to 6 KnitWarm products at the same time)