100-pack bulk face mask elastic cords with adjustable rubber stoppers (50 black/50 white) for making and improving comfort of face masks. Perfect for making cloth masks. Quality, adjustable elastic for facemasks and face shields. Adjustable elastic fits men, women and children-- one size fits all. Skin friendly, irritation-free, machine washable and stretchable without deforming, fraying or breaking. Safe and quality material, 100% guaranteed customer satisfaction guaranteed. Easy to sew on, ideal for DIY projects. Shrink resistant, durable and strong elasticity. Aesthetics and function to improve your craft and mask making. Combination of black and white colors offers flexibility and diversity. We are a small, family-owned business and your satisfaction is important to us.