AltaEDGE gives you the stability platform needed for difficult work environments like roofing. With the unique tread and blade design, the AltaEDGE Stabilizer Knee Pad provides a confident "solid" level feel to your movements on uneven surfaces. This feature combined with the extreme grip characteristics of the VIBRAM rubber cap will keep you in place with no slipping or sliding on any surface wet or dry, smooth or textured. Just like the soles on a boot made with VIBRAM material these knee pads are built to last with exceptional traction and wear. AltaEDGE is built with the same quality materials and construction used on all ALTA knee and elbow pads. AltaLOK wide-set adjustable fasteners, heavy-duty CORDURA nylon covering and thick memory foam padding combine to give you unmatched comfort and durability.