Age: 13 years and above Material: polyester fiber Attribute 1: 1 piece knee pad compression Attribute 2: Unisex sports knee pads Attribute 3: Relieves joint arthritis Attribute 4: Running and fitness Attribute 5: Elastic bandage knee pads Attribute 6: Suitable for playing basketball Attribute 7: Suitable for playing volleyball Attribute 8: Only sell one piece, not a pair Attribute nine: Knee pads Attribute 10: Leg protection 1 Pack Unisex Sports Knee Pads for Arthritis Relief Running Fitness Elastic Bandage Knee Pads Basketball Volleyball Material: nylon, spandex, latex Size: S M L XL XXL XXXL S: Top width 15.5cm, bottom width 13.5cm, length 26cm The recommended foot circumference is 30-35 cm, suitable for a weight of 45-60 catties M: Maximum width 16cm, bottom width 14cm, length 26cm Recommended foot circumference is 35-42 cm, suitable for weight 60-75 kg L: Maximum width 17.5cm, lower width 15.5cm, length 27cm The recommended foot circumference is 42-52 cm, suitable for a weight of 75-90 catties XL: Maximum width 18.5cm, lower width 16.5cm, length 27cm Recommended foot circumference is 52-57cm, suitable for weight 90-105kg XXL: Top width 19.5 cm, bottom width 17.5 cm, length 28 cm Recommended foot circumference is 57-63 cm, suitable for weight 105-120 catties XXXL: Top width 20.5 cm, bottom width 18.5 cm, length 28 cm Recommended foot circumference is 63-68 cm, suitable for weight 120-135 kg suitable for: adults for fitness, basketball, volleyball, cycling, running, etc. Manual measurement, please allow 1-2 cm measurement deviation due to various monitors and lighting conditions, the color may be slightly different from the photo: sticky and easy to tear . 3. Double-layer packaging: firmly protect the meniscus package style: 1 piece x kneepad (not paired) Foot circumference measurement method: 10 cm from the top of the kneecap