Very lightweight and breathable knee protector for biking. The pads were designed for mountain bikers who prioritize minimal protection and prefer to wear light, flexible, and well-ventilated guards rather than forgoing protection altogether or using heavy protectors. The Joint VPD Air is thinner than the top model Joint VPD 2.0 and features a non-slip neoprene insert on the inside. The elastic strap on the knee pad also prevents slipping during rides.