Foot Ascenders & Foot Loops

Buying guide

How foot ascenders and foot loops work

A foot ascender is a toothed cam device that straps to your boot. When you stand, it locks onto the rope; when you lift your foot, it slides up. Paired with a hand ascender or chest device on a stationary rope, it lets you climb in a smooth step-stand-step rhythm that saves your arms for the work at the top.

Foot loops are simpler. A footloop is a sling or adjustable strap that clips to a hand ascender so you can stand in it. Many climbers start with a foot loop and a hand ascender, then add a foot ascender once they are climbing SRS regularly.

Right foot, left foot and knee ascenders

Most climbers run a foot ascender on the right foot, but left foot models exist, and some climbers run both for a rope walking style ascent. Knee ascenders mount higher on the leg and connect to the foot so the device moves with your knee, which some climbers find faster in long open ascents.

Match the device to your rope diameter and boot. A foot ascender should clamp snugly without crushing the boot, and the release should be easy to work with gloves on.

Rope matters as well. A foot ascender that grips cleanly on a firm, round 11.7 mm line may behave differently on a softer or fuzzier rope, so test it on the rope you actually climb before trusting it on a long ascent.

Using them safely

A foot ascender is not a life-support device on its own. It is there to help you climb, while your primary attachment stays on a device rated for life support. Keep the rope tended below you so the foot ascender feeds cleanly, and practice removing it while hanging before you need to do it high in a tree.

Inspect teeth, springs and straps before each climb. Worn or packed teeth slip, especially on muddy or icy rope.

If you are new to SRS, practice the whole ascent at low height with a trainer watching. It is easy to build a habit of loading the foot ascender awkwardly or letting slack build below your device, and both are much easier to correct on the ground than at the top of a tall tree. Wet, muddy or icy conditions call for extra attention, since teeth clog and grip falls off.

Setting up your ascent system

A common SRS ascent setup combines a hand ascender clipped to your bridge with a foot loop, a foot ascender on the right foot, and your friction device or rope wrench system already installed above. As you stand, the hand ascender slides up; as you sit, the friction device takes your weight. Some climbers add a chest harness with a chest ascender for a more efficient rope walk. Whatever you build, practice the full changeover from ascent to work mode close to the ground first.

Foot loops should be adjustable so you can set the height for your leg length. Too long and every step is wasted; too short and you cannot stand fully. Spend a few minutes tuning the length and the climb gets much easier.