Rubber non-slip elastic band
https://www.ywmingai.com/product/nonslip-elastic-band/ma0010-rubber-nonslip-elastic-band.html
Silicone applications on narrow elastics is an additional value-added service on garments with appearance like dot, wave, letter, logo patterns. The number of silicone styles and the width and the pattern of the elastic band can be customized to the customer’s requirements.