Feature: 1. Elastic and Durable: The elastic material has strong stretch and can quickly return to its original shape, light and breathable, and comfortable to wear. 2. Three-dimensional weaving, thickened sponge, which perfect for soft skin and comfortable to wear. 3. It has a good support, honeycomb anti-collision honeycomb, cushioning and anti-collision effect, effectively preventing muscle strain. 4. Comfortable and Breathable: Easy to wear, suitable for running, ball games and outdoor sports. Specification: Material: Polyester, sponge Color: Black, Rose red, Blue, Pink, Grey Size XS: Leg circumference 19-26 cm, suitable weight 15-25kg, suitable for age 4-7 years old children Size S: Leg circumference 27-33 cm, suitable weight 25-45kg, suitable for age 7-12 years old children Size M: Leg circumference 28-45 cm, suitable weight 45-60kg Size L: Leg circumference 34-53 cm, suitable weight 60-90kg Package includes: 2pcs/pair Knee Support Pad