Fret Wrap, String Muter, or String Dampener - Iron Age Guitar

A fret wrap is a simple yet ingenious device that's gained popularity among guitarists & bassists. It is designed to control & dampen string noise, allowing players to achieve a more controlled & professional sound. Here's what you need to know..
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Are fretwraps a good substitute for palm muting? - Quora

Ernie Ball FretWraps by Gruv Gear

Under what circumstances does a guitarist use a string dampener? - Quora

Gruv Gear String Dampener - LARGEThe world-famous FretWraps are now available in single packs! Effectively cut overtones and sympathetic resonance during recording, live performance, two-hand tapping, or any creative situation where you need that extra muting hand for cleaner takes without the unwanted string noise or ringing. The adjustable strap lets you fine-tune the pressure and dampening of the strings. Quickly slides over the headstock when not in use.

GRUV Gear FretWraps String Muter 1-Pack , Large, Black

I play lefty flip right strung. Got a left handed strat and had it restrung right, and the guy that did it, didn't use the string tree. Should I use it?