The HELD Knee Protector D3O is a flexible soft-foam protector designed to offer superior impact protection. Under normal conditions, its intelligent molecules move freely, making the protector soft, flexible, and comfortable as it adapts to the body's contours. In the event of a sudden impact, these molecules instantly lock together, providing exceptional shock absorption. This rapid molecular reaction occurs in a fraction of a second, and the molecules return to their original state just as quickly once the impact is over. The HELD Knee Protector D3O is ideal for use in protective jackets or pants inserts, especially for off-road riding, ensuring both comfort and safety during intense activities.