4 PCS Mask Hook Adjustment Buckle Ear-Wearing Mask Anti-Squeeze Ear Lanyard Extending Ear Rope(Black)

Features:
1. Adjust the tightness of the mask to prevent the ears from being constricted
2. Multiple sections are available for adjustment
3. Ship without mask
4. Polyester material, comfortable to wear, soft and elastic

Specification:
1. Material: polyester
2. Purpose: Adjust the tightness of the mask and prevent the mask from falling
3. Color: black, white
4. Size: 2.2x10.5 cm