Wool string silencers are the cheapest, quietest upgrade you can put on a traditional bow. Two small puffs of wool, tied into the string a third of the way from each tip, soak up the high-frequency buzz that makes a recurve or longbow announce itself at twenty yards. They weigh almost nothing, they dry fast, and if you shoot in cold or wet country they beat rubber cat whiskers, which stiffen and rattle when the temperature drops.
What you need
- A hank of 100% wool yarn (untreated, not superwash). One skein makes dozens of sets.
- Scissors, a bow stringer, and string wax.
- Optional: a small piece of stiff wire or a hair clip to make a puff jig.
Synthetic yarn is the one thing to avoid. Acrylic melts under friction, mats down, and holds water. Real wool stays lofty.
Where they go
Measure from the string groove at each limb tip and place a silencer about one third of the string length down from each end — roughly 8 to 10 inches from the nock groove on most 58 to 62 inch bows. That puts them near the string's vibration antinode, which is where damping does the most work per grain of added weight.
Place both silencers symmetrically. An off-balance pair can shift tiller feel and knock your brace-height tune slightly out.
Step by step
- Unstring the bow. Every silencer install is done with the string relaxed. Trying to force strands apart under tension frays serving and pinches fingers.
- Cut your wool. For a tied-in puff, cut 12 to 16 strands about 5 inches long. For a wrap-style silencer, cut one 10-inch length.
- Separate the string bundle. Twist the string slightly, then use a pencil or your thumbs to open the strands into two halves at the install point.
- Insert the wool. Slide the bundle of short strands through the gap so it sits centered, half the fibers on each side of the string.
- Lock it in. Let the string untwist and pinch the wool. Then take one long strand and tie a tight double overhand knot around the base of the puff, snug against the string. Some shooters add a second wrap-and-knot below the first for insurance.
- Trim to shape. Cut the puff to a rough teardrop about 1.5 to 2 inches long. Longer wool damps more but slows the string slightly; shorter is faster and louder.
- Restring and shoot. Fire six to eight arrows, then re-trim if you hear residual buzz.
If you prefer a second angle on the same job, this walkthrough shows the puff being tied and trimmed on a hunting-weight recurve.
Tuning the amount of wool
Silencers are a tradeoff: string mass buys quiet and costs a small amount of arrow speed. A pair of trimmed wool puffs typically adds 20 to 40 grains total, which usually reads as one to three feet per second on a chronograph — inaudible in the field, and worth it for the noise reduction.
Start with more wool than you think you need, then trim in small increments while listening. Stop as soon as the shot goes from a twang to a dull thump.
Care in the field
Wool absorbs water, and a soaked silencer is a heavy silencer. On rainy hunts, squeeze the puffs out and fluff the fibers with your fingers before you sit. Re-wax your string every few hundred shots and pick any grit out of the wool; abrasive dirt trapped against the strands is what wears strings prematurely.
Replace silencers when the fibers mat into a solid felt pellet. That usually takes a full season of hard shooting.
Wool vs. the alternatives
- Wool puffs: quietest per grain in dry cold, cheap, easy to trim, absorbs water.
- Beaver or otter fur: nearly as quiet, sheds water far better, more durable. See our fur string silencer install guide.
- Rubber cat whiskers: waterproof and durable, noisier in cold weather, can whistle in wind.
Bottom line
Two puffs of untreated wool, tied a third of the way down from each tip and trimmed to a teardrop, is the classic traditional setup for a reason. It costs a few dollars, takes ten minutes, and takes the sharpest edge off your bow's signature — the part a whitetail reacts to first.
Pair the install with a fresh string wax, and check your arrow spine if you have changed string mass significantly.