FrogWeara Knee Protection Non-Marring, Premium, High-Visibility Hinged Knee Pads – These non-marring, premium, knee pads feature a soft, formed, PVC cap with a padded hinge design to increase user comfort when worn for extended periods of time. closures at thigh and calf are adjustable and feature buckles for easy donning and removal. They are ergonomically curved for a comfortable fit.