Choose your knee pads:3 options, age S (5-10 years old) M (100-155 pounds) L (155-170 pounds) Weight S (24-50KG) M (45-60KG) L (60-90KG) Knee circumference S (27-33CM) M (28-45CM) L (34-53CM)/S (9-13in) M (11-18in) L (13-21in), age, weight, knee circumference, choose any one as the appropriate knee pad for measurement. Knee Protection - Our volleyball knee pads adopts a thickened EVA material pad inside, with shock absorption and anti-collision.This can effectively reduce stress while kneeing, relieve the impact on knee joints during exercise. High Quality Material - Good elasticity, and breathable fabric, fast-dry and absorbing sweat, lightweight. Elastic cuffs can prevent knee sleeves from rolling, sliding or slipping off during exercise. Thicker than other knee protectors to provide extra reinforcement without sacrificing comfort, so you can wear them all day long. Ergonomic - Sports knee pads are designed according to the characteristics of human knee joint structure and sports.Suited for adolescents who has lots of activities involving knees.Very suitable as knee protector for outdoor sports since its super lightweight, provides freedom of movement and has sturdy good looks. Multifunction - Professional knee pads for meniscus tear, arthritis, ACL, joint pain relief, sports injury recovery. Widely used in many sports such as volleyball, weightlifting, basketball, running, jogging, tennis, hiking and more. Unisex - Universal for men and women. Please refer to our size chart to selection. Available in a variety of colors, which are very suitable for women men kids who like sports and need to protect their knee joints. It is a thoughtful holiday gift, convey your care and love.