1. Pay attention to the size: Use a flexible tape measure. Stand up and stretch your legs. Measure the leg circumference 10cm below the knee. Reference size: 40*13cm / 15.7*5.1 inches. 2. Breathable and sweat absorbing, comfortable fabric: The rear ventilation hole wicks away sweat. The soft, breathable fabric absorbs sweat, keeping the skin dry for enhanced comfort. Firm and non slip with good elasticity, effectively relieving knee strain during training. 3. Adjustable knee stabilizer: Has an adjustable Velcro strap for a proper fit. Easy to slide and adjust for a comfortable wear. Elastic cuffs prevent rolling or slipping during exercise. 4. Ergonomic design: Designed based on the structure and movement properties of the human knee joint. Ideal for individuals with knee joint activity. Effectively cushions and distributes pressure, keeping knees warm and joints lubricated. Provides sports protection and pain relief.