Ergodyne ProFlex 355 Short Cap Injected Gel Knee Pads Optimal Gel comfort with two cap options. Great for multiple surfaces. Patented suspension design redirects pressure away from the patella; 10mm Injected Gel and PU foam Patented cover design delivers stability on all terrain; Cap is easily removed for 2-in-1 kneepad Short cap design for mobile protection; Upper and lower elastic straps with hook & loop closure Silicone-free