This is Pellon® 1/4" Knit Elastic in white.
Sold in 6 yard or 12 yard cuts(about 5.5 meters and 11 meters)
The sewing needle will not affect stretch of the elastic. Its width does not narrow when stretched. Use for waistbands, bags, gloves, undergarments, head wear, straps, and of course face masks!
Machine washable/dryable in temperatures up to 200°F.
50% Polyester, 50% Rubber