Ergonomics design: Pre-curved design conforms to the body, flexible activities, unconstrained sense, more fit and comfortable. | PE plastic shell: large area PE plastic shell and high strong protection,allows for a greater degree of comfort and protection for knees and shins. with superior wear resistance, play a better cushioning in the collision. | Mesh fabric & foam pads: better breathability, soft and skin-friendly fabric without heat,allows for a greater degree of comfort and protection for knees and shins. | One-adjust quick release strap system allow for quick and easy application and removal,the size of Elastic bands can be ajustable. | Dimension of knees: approx. 40x15cm/15.75x5.9"; Suitable for protecting knees of adult Motorbike/Motorcross, Biking & Cycling, Skating etc., reduce knee injury.