Heavy-Duty Protection in A Lightweight Package. The Hex Pro Knee Guard Features Our New Hex Pad Impact Technology, Providing CE EN 1621-1 Level Protection to Direct Knee Impacts and Extending Impact Protection Zones To The Sides Of The Knee And Upper Shin. HEX Impact Insert Fully Breadable CE 1621-1 Level Protection Molded Bio-Foam Knee Condyle and Shin Protection for Increased Impact Protection Single Thigh Compression Strap and Trac Grip Keep the Pad Locked in Place While Maintance Comfort Sold in Pairs.