The G Form Pro X Elbow Pads don't rely on excessive padding to protect you. Instead, it uses a technology called RPT to provide flexibility when you're riding, with impact protection the moment you hit the deck. This technology is rate dependent. This means that the molecules, which make up the soft padding, slightly repel each other under normal wear. Upon impact, they instantly bind and redistribute impact force to reduce injury. Once the energy from the impact is gone, the material once again becomes soft and pliable. They are form fitting with an articulated design to provide freedom of movement.