Multipurpose Cord LocksA functional sliding fastener designed to attach to drawstrings and tightens without the use of knots. Great for camping, hiking and widely used for shock cord, elastic cord, finer cord, pull cord, draw cord, wet cord, shoelace, lanyard, luggage, pack drawstring, pants closures, sportswear, tent and a variety of outdoor and gym products. Easy to UseSuitable for all disposable and reusable regular adult and kid size face masks and compatible with round and flat elastic bands with different widths. Simply squeeze the barrel and the toggle together to move the cord lock along the band to adjust the length. Especially convenient and simple to use when youre wearing gloves. Premium QualityDurable, reusable, skin-friendly, easy to install, comfortable to wear and simple to sterilize. Non-toxic, environment-friendly, odorless, BPA-free, PVC-free, phthalate-free, latex-free. Safe for children. 100% Satisfaction Guaranteed. Snug Fit for Good ProtectionFace mask ear loop bands too long? These lightweight elastic band toggles will help you adjust the length of the mask ear loop cords and lock them tightly and securely in place, so the face mask can fit your face comfortably with a good seal for more effective protection. 10-Color 100PCS Value PackA simple brilliant fastening solution and ready to use for face masks and medical gowns. Heavy duty, reliable and built to last. Set includes 100pcs unisex multifunctional round bubble spring-loaded face mask cord locks in 10 assorted colors. Compatible with cord diameter up to 0.28/7mm.