I hadn't had a need for an arm gaurd nor a desire to wear one until it started getting cold and I found out that depending on how I was twisted the string could catch my sleeve when shooting. I haven't noticed it throwing the trajectory off but it can sometimes create louder string noise as it slaps the jacket sleeve. The arm guards I've seen have hard plastic in them which would probably be even louder than hitting my jacket. I was thinking maybe a compression sleeve or to diy something similar to make the sleeve more slender and less likely to get caught up with the string? I was thinking of an loop of half inch elastic that could be doubled over in an endless loop to compress the sleeve. I think a baseball compression sleeve would maybe work too. Does anyone use an arm guard or compression sleeve or something similar for this purpose? I hate to bring more junk with me but I may want to in order to avoid that string to jacket noise. The amount of noise does vary depending on what jacket I am wearing.