Knee Ascent Foot Loop Ascender

PETZL KNEE ASCENT LOOP – Complete Knee Ascender Assembly for Tree Care

The PETZL KNEE ASCENT LOOP is a comprehensive and highly efficient knee ascender assembly designed to significantly facilitate the arborist's ascent on a single rope. Ideal for tree care professionals across the UK, this system streamlines climbing when using the ZIGZAG or ZIGZAG PLUS mechanical Prusik.

This all-in-one assembly includes everything you need for an efficient knee ascender setup:

• An upper strap for secure attachment.

• A robust CROLL L rope clamp for reliable gripping.

• A lower strap with integrated foot loop for comfortable and powerful leg engagement.

• An XS size TOOLBAG tool pouch, perfect for small essentials you need close at hand during the ascent.

The entire KNEE ASCENT LOOP system is fully adjustable, ensuring it comfortably adapts to all body shapes and sizes. This customisable fit enhances both efficiency and comfort, reducing fatigue during long or repeated ascents in the tree canopy.

Features:

    Facilitates ascents on a single rope:
    - upper strap is connected to the mechanical Prusik to allow the ZIGZAG or ZIGZAG PLUS and CHICANE unit to be raised
    - CROLL L rope clamp is integrated, for a comfortable ascent in conjunction with a PANTIN foot-mounted rope clamp (not included)
    - lower Dyneema strap with foot loop for optimal foot positioning
    Easy to install and remove:
    - easy to put in place, thanks to connectors and adjustment buckles
    - comes with XS size TOOLBAG tool pouch, making for a system that is always ready to use
    - CROLL L rope clamp is easy to install, thanks to the integrated thumb catch
    Multiple settings adjust to different shapes and sizes
    Optimal durability, thanks to components available as spare parts

Specifications

•     Material(s): aluminum, steel, nylon, polyester
•     Weight: 280 g
•     Min. rope diameter: 11,5 mm
•     Max. rope diameter: 13 mm
•     Rope compatibility: EN 1891 type A low stretch kernmantel ropes

The PETZL KNEE ASCENT LOOP is an indispensable tool for any professional arborist looking to improve their single rope ascent technique with a reliable, comfortable, and fully integrated system.

Christmas Returns (Extended)

To give you extra peace of mind over Christmas:

• Orders placed between 10 October and 24 December 2025 can be returned up to 26 January 2026 (excluding Sale items)

• Orders placed from 25 December 2025 onwards are covered by our standard 30-day return policy

UK Delivery

Fast, reliable delivery from our UK warehouse.

• FREE UK Delivery on orders over £50 + VAT
  Estimated delivery: 2–4 working days

• UK Standard Delivery from £3.60 + VAT
  Estimated delivery: 2–4 working days

• Next Working Day Delivery – £5.00 + VAT
  
  Order before 3:00pm (Monday–Friday) for next working day delivery
  

All UK orders are dispatched Monday–Friday and sent via a tracked courier service.