Over the years I have gathered many tools that have become indispensable to me in my studio. Here are a few that are easy to find online.
Goody Girls Ouchless Elastics, 2 mm, No metal
Target or Amazon, various counts and prices
I use these on my treadles so I can treadle without peaking: “Braille” for my feet. I put them on all of my treadles and slide certain ones down so my feet can feel them and others up out of the way so I cannot. I like to put 3 on each treadle so they are "bulkier" and easier to feel with my feet.
I have been happily weaving since my son was born in 1988.