Glide's unique multi-curved stem rotates for a custom fit inside each ear canal. With its unique curved stem design for easy insertion and removal, you simply push & twist for Glide to angle its way to find your fit. Reusable style features soft and flexible, triple flange design that provides superior seal for most size ear canals along with maximum comfort, even when worn for a full shift. Cord can be attached at any desired length. NRR 27. 100% PVC-Free, Made in USA. 50 pair per box.