ToughBuilt GelFit Knee Pads redefine how professionals use their Knee Pads. This patented kneepad system allows various SnapShells to be easily snapped on and interchanged. Create exact kneepad to fit every job. Ergonomic gel and foam design embraces natural shape of knee and upper shin, maximizing pressure distribution for all-day comfort. High side walls greatly reduce twisting off of knee. EVA elastic leg straps comfortably hold their place without cutting off circulation or binding behind knee. materials and construction make these reliable Knee Pads withstand most rigorous working conditions.