which side of your body does the foot loop go on?

I use mine on my left side, foot loop on my left foot and upper bunge clip attached to my suspenders on my saddle, because I have my foot ascender on my right foot. If your using foot ascender on the left it should be on the right. There are a lot of good YouTube videos on it. Highly suggest if you have never used it before to practice with it low to the ground and get very comfortable with clipping into and out of the system before getting to far off the ground. Can be tricky untill you get the hang of it. Really have grown to love this setup. Be safe. Hope this helped.

This haas system come with built in foot straps?

Yes, the blue one does. The red one is for click-n-step.

Does it work with 9mm rope?

Manufacturers recommendations are for up to 13mm line, I use mine with both 11.8 and 13 and it works well. Just inspect your line every time before you climb. The cams can and will wear the line, if your using it as an arborist highly recommend that you climb on a rope rated to ANSI standards, your family will appreciate it.

Weaver Arborist Nylon Foot Ascender Tree Climbing Sling Regular Haas

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VT85913

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Description

🧗‍♀️ Elevate your climb with zero hassle and maximum control!

QUICK MAINTENANCE - Replace bungee cord in under 5 minutes without tools to minimize downtime
EFFORTLESS ASCENTS - 30" in-line bungee absorbs shock to reduce fatigue and smooth your climb
PRECISION ENGINEERING - Sealed stainless steel bearings in machined aluminum ensure silky rope glide
DURABLE FRICTION SAVING - Built-in friction saver mechanism extends rope life and gear durability
ZERO SETUP MULTI USER READY - Instant use for teams—no adjustments needed, just clip and climb

The Weaver Arborist Nylon Foot Ascender is a professional-grade climbing sling featuring a 30" shock-absorbing bungee, precision-machined aluminum components with sealed bearings for smooth rope movement, and a tool-free bungee replacement system. Designed for multi-user setups and built to reduce rope wear, it delivers reliable, fatigue-reducing performance for arborists and tree workers seeking durable, easy-to-use climbing gear.

Specifications

ASIN	B01N5YFCO2
Best Sellers Rank	#271,284 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #361 in Horse Halters
Brand Name	WEAVER ARBORIST
Color	Black/Blue
Customer Reviews	4.7 4.7 out of 5 stars (113)
Fastener Type	snap
Global Trade Identification Number	00867321000054
Hardware Material	Nylon
Included Components	Ascender
Item Dimensions L x W	16"L x 2"W
Item Type Name	Nylon HAAS® Velox Ascent System, Regular
Line Weight	At least 3000 lb
Manufacturer	Weaver Leather, LLC
Manufacturer Part Number	08-98110
Manufacturer Warranty Description	Always guaranteed.
Material Type	Other
Model Number	08-98110
Number of Items	1
Number of Pieces	1
Other Special Features of the Product	Bungee Cords with Hook
Product Style	Regular
Size	One Size
Strap Type	Adjustable
UPC	867321000054
Unit Count	1.0 Count

Reviews

J**.

Good quality product

Works great with my gear gets me up the tree safely

24.01.2026

S**E

Easy to use

One of the best on the market. Works really well. If you have the right boots, get the clip style though(easier in the tree to get off)

26.08.2025

D**N

Great knee ascender

Expensive, but very well made a very effective. Made with top shelf components and is well thought out. Makes climbing much easier than hump’n (hip thrusting) your way up to the top floor of a tree!

17.05.2025

A**Y

Desde que compré este producto mi trabajo se ha echo súper fácil. Escalar por la cuerda de manera rápida y fácil. Lo volvería a comprar sin pensarlo

26.10.2025

S**Y

Love

Very good

4.10.2025

H**O

Justo lo que se describe.

22.08.2025

M**.

Muy bueno

31.07.2025

J**.

Best

The only knee assender you need

23.02.2025

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