The HELD Shoulder Protector D3O is a flexible soft foam protector. It features intelligent molecules that move freely under normal conditions, making the protector soft, flexible, and adaptable to the body. Upon sudden impact, these molecules instantly bond together to provide excellent shock absorption. This reaction occurs within a fraction of a second and returns to its original state just as quickly once the impact is over. Ideal for off-road use, these protectors can be integrated into jackets and pants for enhanced safety.