マスクや帽子用丸ゴム

I was surprised how well this round elastic holds its shape after multiple washes on my homemade masks. The 1.5 mm diameter is thick enough to stay put without cutting into my ears.

The 1.5 mm thickness is exactly what I needed for the mask loops, thick enough that they don't snap when stretched but still soft against the ears. I got about 40 masks out of one roll, so the yardage is generous.

I used this to make adjustable hat straps for my kids' sun hats and it holds a knot really well without snapping. The white color blends in nicely with the fabric too, so it doesn't look like a craft project gone wrong.