It can be attached to drawstrings and tightens without the use of knots. Suitable for all types of face coverings, adult and child, drawstrings, you only need to adjust the cord locks to get proper tightness.
100 Silicone Cord Locks Toggle Adjustable Elastic Cord Stopper for Face Mask
Adjustable Silicone Cord Locks Toggles Lanyard Buckle Elastic Cord Stopper UK
Adjustable Silicone Cord Locks Toggles Lanyard Buckle Elastic Cord Stopper UK.
Adjustable Silicone Cord Locks Toggles Lanyard Buckle Elastic Cord Stopper-UK
Silicone Cord Locks Toggles for Drawstrings Elastic, Adjustable Lanyard Buckle
