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. Adjustable:One-adjust quick release strap system allow for quick and easy application and removal,the size of Elastic bands can be ajustable. Ergonomics design: Pre-curved design conforms to the body, flexible activities, unconstrained sense, more fit and comfortable. Widely Use:Suitable for protecting knees of adult Motorbike/Motorcross, Biking & Cycling, Skating etc.reduce knee injury.