Thin knee pads & football knee pads, protective knee pads, used for running, hiking, basketball, anti-slip breathable soft sponge knee pads. Size chart: S: 48cm in length and 16cm in length at the upper port, which is suitable for leg circumference of 37-43cm. M: length 48cm, upper port length 17cm, suitable for leg circumference of 43-48cm. L: length 49cm, upper port length 18cm, suitable for leg circumference of 48-53cm. XL: length 49cm, upper port length 19cm, suitable for leg circumference 53-58cm. XXL: length 50cm, upper port length 20cm for leg circumference 58-63cm. Material: nylon, spandex Product description:It can effectively relieve the pain caused by the impact of cement, bricks or hard floors. Therefore, additional assistance can be obtained when being used for recovery after injury. These knee pads are made of spandex and nylon with a mesh of ventilation holes, ensuring a comfortable feeling and a high level of breathing ability. It can prevent this knee pad from slipping or rolling during sports activities. Our knee pads can be widely used in many sports, such as dancing, volleyball, yoga, basketball, running, skateboarding, football, mountain climbing, cycling and other sports.