The ProFlex 450 Comfort Hinge™ Gel Knee Pads improve upon our best-selling 350 Knee Pad design by adding an innovative hinged technology that enhances comfort, fit and stability. The hinge enables the knee pad to easily bend and straighten along with the leg’s natural movements. Combined with locking-buckle and hook & loop elastic straps that sit higher and lower on the leg, these soft shell knee pads are specifically engineered to stay in place when walking, crawling or kneeling.