Age: 13 years and above Model: One knee pad Material: nylon, latex silk, spandex, silicone Attribute 1: 1 elastic knee pad Attribute 2: Used to play basketball Attribute 3: Used to play volleyball Attribute 4: Sports and running Attribute five: sports bike Attribute 6: Used to play basketball Attribute 7: Knee pad protection Attribute 8: Fitness equipment Attribute 9: Used to play football Attribute 10: mountain bike, Nylon elastic knee pads, sports and fitness knee pads Specification: Material: nylon, latex silk, spandex, silicone Color: black/red/green/orange/blue Size: S/M/L/XL/XXL/XXXL S...The top width is 15cm, the bottom width is 13cm, and the length is 27cm Recommended leg circumference 30-34cm, suitable weight: 35-40kg M...The top width is 16cm, the bottom width is 14cm, and the length is 27cm Recommended leg circumference 35-41cm, suitable weight: 40-60kg L...The top width is 17cm, the bottom width is 15cm, and the length is 27cm Recommended leg circumference 42-47 cm Suitable weight: 60-75kg XL...top width 18cm, bottom width 16cm, length 27cm Recommended foot circumference 48-55 cm Suitable weight: 75-95 catties XXL...top width 18.5cm, bottom width 16.5cm, length 29cm Recommended leg circumference 56-63 cm Suitable weight: 95-110kg XXXL...top width 19.5cm, bottom width 17.5cm, length 29cm Recommended leg circumference 63-70 cm Suitable weight: 110-125kg This package includes: 1 x knee pads (1 piece, not 1 pair)