Choosing the right arborist throw bag is one of those things that seems incredibly simple until you're standing at the base of a massive oak, staring at a sixty-foot canopy, and realizing your gear just isn't doing the job. If you've spent any time in the trees, you know that the "perfect throw" is half skill and half having the right weighted bag at the end of your line. It's the gatekeeper to your entire climb. If you can't get that line over the right union, you're not going anywhere—or at least, you're not going there easily.
It's All About the Weight
The first thing you'll notice when shopping for an arborist throw bag is that they come in a bunch of different weights, usually measured in ounces. You'll see everything from a light 8oz bag to a heavy 16oz or even 20oz "brick."
If you're just starting out, a 10oz or 12oz bag is usually the sweet spot. It's heavy enough to pull your throw line back down through thick foliage, but light enough that you won't blow out your shoulder trying to chuck it into the upper canopy. If you go too light, the bag might get stuck in the "crotch" of the tree because it doesn't have enough gravity on its side to overcome the friction of the bark. Go too heavy, and your accuracy starts to tank, especially as the day goes on and your arms get tired.
Shape and Material Matter More Than You Think
You might think a bag is just a bag, but the shape actually changes how it flies. Most modern bags are teardrop-shaped or "bullet" shaped. This isn't just for looks; it's about aerodynamics and snag resistance. A well-designed arborist throw bag should be sleek enough to slip between branches without getting hung up on every little twig.
The material of the bag is another big factor. Most are made from heavy-duty Cordura or some kind of reinforced synthetic fabric. You want something that can take a beating. It's going to hit pavement, bounce off trunks, and scrape against rough bark. If the stitching is weak, you'll end up with a "lead rain" situation where the inner weights start leaking out. Speaking of weights, look for bags that use steel shot or some kind of non-toxic interior. Old-school bags used lead, which isn't great for the environment (or you) if the bag eventually rips open in the woods.
The Art of the Throw
There are a few ways to actually get that arborist throw bag into the air. Most guys use the classic "between-the-legs" swing. It's all about momentum. You hold the line, let the bag swing back and forth to get a rhythm, and then release it at the peak of the forward arc. It takes practice—a lot of it. You'll probably spend your first few weeks hitting every branch except the one you're aiming for.
Then there's the "cradle" or "shot put" style for shorter, more precise shots. And of course, if you're dealing with seriously tall timber, you might put the bag into a giant slingshot like the Big Shot. Even with mechanical help, the bag choice matters. A bag that's too floppy won't sit right in a launcher, leading to those frustrating "whiskey shots" that go off in a random direction.
Keeping Your Line Tangle-Free
An arborist throw bag is only as good as the line it's attached to. If your throw line is a knotted mess, the best bag in the world won't help you. Most pros use a throw cube to keep everything organized. When you're pulling the bag back down, you want it to flake into the cube naturally.
One trick I've learned over the years is to always check your knots. A simple girth hitch or a clove hitch usually does the trick for attaching the bag to the line. Some bags have a small D-ring, while others have a fabric loop. Whatever you use, make sure it's low-profile. A bulky knot is just one more thing that can get snagged when you're trying to retrieve the bag after a missed shot.
Why High-Visibility Is Your Best Friend
It sounds obvious, but buy a bag in a bright color. Neon orange, bright pink, or "safety" yellow are the standards for a reason. When your arborist throw bag is buried in a sea of green leaves sixty feet up, you need to be able to see it. There's nothing more frustrating than knowing your bag is "up there somewhere" but not being able to spot it to see if it's seated correctly.
Also, bright colors help you find the bag when it inevitably misses the target and lands in a pile of brush on the forest floor. We've all spent twenty minutes hunting for a camo-colored bag that we thought landed "right over there." Save yourself the headache and go bright.
Dealing With the "Tree Tax"
Let's be real: you are going to lose an arborist throw bag eventually. It's what we call the "tree tax." You'll throw a perfect line, it'll wrap itself three times around a dead limb, and no amount of rhythmic tugging is going to get it back.
Because of this, it's always a good idea to keep a spare bag (or two) in your kit. Some guys even carry different weights for different scenarios. If the wind is kicking up, you might swap your 10oz bag for a 14oz just to keep the flight path more predictable. Having a backup means you don't have to pack up the whole job just because a stubborn oak decided to keep your favorite bag as a souvenir.
Maintenance and Care
Believe it or not, you should actually take care of your throw bags. After a rainy job, don't just toss a wet arborist throw bag into a sealed plastic bin. The fabric can mildew, and the metal shot inside can start to clump or degrade. Let them air dry. Check the attachment point for fraying every now and then. It's a small piece of gear, but it's under a lot of tension. If that loop snaps mid-swing, you've basically got a projectile flying toward whatever (or whoever) is standing nearby.
Final Thoughts on Choosing Your Kit
When you're looking for a new arborist throw bag, don't feel like you have to overcomplicate it. Look for a reputable brand, pick a weight that feels comfortable for your throwing style, and make sure it's a color you can actually see.
It's one of those tools that requires a "feel" for the work. After a few hundred throws, the bag starts to feel like an extension of your arm. You'll know exactly how much "oomph" to give it to clear that high branch, and you'll know exactly when to let go. It's a simple piece of equipment, but getting it right makes the difference between a smooth start to your climb and a long morning of frustration. So, grab a couple of different sizes, head out to a local park, and start practicing. Your shoulders (and your climbing partner) will thank you.