TSG - Kneeguard Tahoe Zip AHIGHLIGHTS AMPLIFIED SOFTSHELL CONSTRUCTION: Softshell look and feel but Hardshell performance. A thin and flexible pierce proof insert inside the pad on top of the multi impact soft foam secures the foam and your joints from crushed rocks or other sharp objects. This is the best choice when you want comfortable soft but reliable impact protection. Available in 4 sizes: S, M, L, and XL. ACF IMPACT FOAM: ACF (Arti Lage Foam) is engineered to mimic the