The Knee Ascent Loop assembly facilitates the arborist's ascent when using the ZigZag or ZigZag Plus mechanical prusik on a single rope. It contains an upper strap, a Croll L rope clamp, a lower strap with foot loop and an XS size ToolBag tool pouch. The system is entirely adjustable and adapts to all shapes and sizes. For use with 8mm - 13mm rope.