It's a simple neoprene strap that fits under the chin, wraps around the sides of the head, and fastens with adjustable Velcro straps at the back. The purpose of the strap is to hold the wearer's mouth closed as they sleep in order to keep open-mouth snoring from occurring throughout the night.
Type: Anti Snore Chin Strap
Work Mode: AUTO
Pressure Range: 4-20 cmH2O
Model Number: anti snore chain strap